SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020–January 2021

Background: Earlier serosurveys in India revealed seroprevalence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) of 0.73% in May–June 2020 and 7.1% in August–September 2020. A third serosurvey was conducted between December 2020 and January 2021 to estimate the seroprevalence of SARS...

Full description

Bibliographic Details
Main Authors: Manoj V. Murhekar, Tarun Bhatnagar, Jeromie Wesley Vivian Thangaraj, V. Saravanakumar, Muthusamy Santhosh Kumar, Sriram Selvaraju, Kiran Rade, C.P. Girish Kumar, R. Sabarinathan, Alka Turuk, Smita Asthana, Rakesh Balachandar, Sampada Dipak Bangar, Avi Kumar Bansal, Vishal Chopra, Dasarathi Das, Alok Kumar Deb, Kangjam Rekha Devi, Vikas Dhikav, Gaurav Raj Dwivedi, S. Muhammad Salim Khan, M. Sunil Kumar, Avula Laxmaiah, Major Madhukar, Amarendra Mahapatra, Chethana Rangaraju, Jyotirmayee Turuk, Rajiv Yadav, Rushikesh Andhalkar, K. Arunraj, Dinesh Kumar Bharadwaj, Pravin Bharti, Debdutta Bhattacharya, Jyothi Bhat, Ashrafjit S. Chahal, Debjit Chakraborty, Anshuman Chaudhury, Hirawati Deval, Sarang Dhatrak, Rakesh Dayal, D. Elantamilan, Prathiksha Giridharan, Inaamul Haq, Ramesh Kumar Hudda, Babu Jagjeevan, Arshad Kalliath, Srikanta Kanungo, Nivethitha N. Krishnan, Jaya Singh Kshatri, Alok Kumar, Niraj Kumar, V.G. Vinoth Kumar, G.G.J. Naga Lakshmi, Ganesh Mehta, Nandan Kumar Mishra, Anindya Mitra, K. Nagbhushanam, Arlappa Nimmathota, A.R. Nirmala, Ashok Kumar Pandey, Ganta Venkata Prasad, Mariya Amin Qurieshi, Sirasanambatti Devarajulu Reddy, Aby Robinson, Seema Sahay, Rochak Saxena, Krithikaa Sekar, Vijay Kumar Shukla, Hari Bhan Singh, Prashant Kumar Singh, Pushpendra Singh, Rajeev Singh, Nivetha Srinivasan, Dantuluri Sheethal Varma, Ankit Viramgami, Vimith Cheruvathoor Wilson, Surabhi Yadav, Suresh Yadav, Kamran Zaman, Amit Chakrabarti, Aparup Das, R.S. Dhaliwal, Shanta Dutta, Rajni Kant, A.M. Khan, Kanwar Narain, Somashekar Narasimhaiah, Chandrasekaran Padmapriyadarshini, Krishna Pandey, Sanghamitra Pati, Shripad Patil, Hemalatha Rajkumar, Tekumalla Ramarao, Y.K. Sharma, Shalini Singh, Samiran Panda, D.C.S. Reddy, Balram Bhargava, Tanu Anand, Giridhara R. Babu, Himanshu Chauhan, Tanzin Dikid, Raman R. Gangakhedkar, Shashi Kant, Sanket Kulkarni, J.P. Muliyil, Ravindra Mohan Pandey, Swarup Sarkar, Naman Shah, Aakash Shrivastava, Sujeet K. Singh, Sanjay Zodpe, Anusha Hindupur, P.R. Asish, M. Chellakumar, D. Chokkalingam, Sauvik Dasgupta, M.M.E. Gowtham, Annamma Jose, K. Kalaiyarasi, N.N. Karthik, T. Karunakaran, G. Kiruthika, H. Dinesh Kumar, S. Sarath Kumar, M.P. Sarath Kumar, E. Michaelraj, Josephine Pradhan, E.B. Arun Prasath, D. Gladys Angelin Rachel, Sudha Rani, Amanda Rozario, R. Sivakumar, P. Gnana Soundari, K. Sujeetha, Arya Vinod
Format: Article
Language:English
Published: Elsevier 2021-07-01
Series:International Journal of Infectious Diseases
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1201971221004422
_version_ 1818454447825616896
author Manoj V. Murhekar
Tarun Bhatnagar
Jeromie Wesley Vivian Thangaraj
V. Saravanakumar
Muthusamy Santhosh Kumar
Sriram Selvaraju
Kiran Rade
C.P. Girish Kumar
R. Sabarinathan
Alka Turuk
Smita Asthana
Rakesh Balachandar
Sampada Dipak Bangar
Avi Kumar Bansal
Vishal Chopra
Dasarathi Das
Alok Kumar Deb
Kangjam Rekha Devi
Vikas Dhikav
Gaurav Raj Dwivedi
S. Muhammad Salim Khan
M. Sunil Kumar
Avula Laxmaiah
Major Madhukar
Amarendra Mahapatra
Chethana Rangaraju
Jyotirmayee Turuk
Rajiv Yadav
Rushikesh Andhalkar
K. Arunraj
Dinesh Kumar Bharadwaj
Pravin Bharti
Debdutta Bhattacharya
Jyothi Bhat
Ashrafjit S. Chahal
Debjit Chakraborty
Anshuman Chaudhury
Hirawati Deval
Sarang Dhatrak
Rakesh Dayal
D. Elantamilan
Prathiksha Giridharan
Inaamul Haq
Ramesh Kumar Hudda
Babu Jagjeevan
Arshad Kalliath
Srikanta Kanungo
Nivethitha N. Krishnan
Jaya Singh Kshatri
Alok Kumar
Niraj Kumar
V.G. Vinoth Kumar
G.G.J. Naga Lakshmi
Ganesh Mehta
Nandan Kumar Mishra
Anindya Mitra
K. Nagbhushanam
Arlappa Nimmathota
A.R. Nirmala
Ashok Kumar Pandey
Ganta Venkata Prasad
Mariya Amin Qurieshi
Sirasanambatti Devarajulu Reddy
Aby Robinson
Seema Sahay
Rochak Saxena
Krithikaa Sekar
Vijay Kumar Shukla
Hari Bhan Singh
Prashant Kumar Singh
Pushpendra Singh
Rajeev Singh
Nivetha Srinivasan
Dantuluri Sheethal Varma
Ankit Viramgami
Vimith Cheruvathoor Wilson
Surabhi Yadav
Suresh Yadav
Kamran Zaman
Amit Chakrabarti
Aparup Das
R.S. Dhaliwal
Shanta Dutta
Rajni Kant
A.M. Khan
Kanwar Narain
Somashekar Narasimhaiah
Chandrasekaran Padmapriyadarshini
Krishna Pandey
Sanghamitra Pati
Shripad Patil
Hemalatha Rajkumar
Tekumalla Ramarao
Y.K. Sharma
Shalini Singh
Samiran Panda
D.C.S. Reddy
Balram Bhargava
Tanu Anand
Giridhara R. Babu
Himanshu Chauhan
Tanzin Dikid
Raman R. Gangakhedkar
Shashi Kant
Sanket Kulkarni
J.P. Muliyil
Ravindra Mohan Pandey
Swarup Sarkar
Naman Shah
Aakash Shrivastava
Sujeet K. Singh
Sanjay Zodpe
Anusha Hindupur
P.R. Asish
M. Chellakumar
D. Chokkalingam
Sauvik Dasgupta
M.M.E. Gowtham
Annamma Jose
K. Kalaiyarasi
N.N. Karthik
T. Karunakaran
G. Kiruthika
H. Dinesh Kumar
S. Sarath Kumar
M.P. Sarath Kumar
E. Michaelraj
Josephine Pradhan
E.B. Arun Prasath
D. Gladys Angelin Rachel
Sudha Rani
Amanda Rozario
R. Sivakumar
P. Gnana Soundari
K. Sujeetha
Arya Vinod
author_facet Manoj V. Murhekar
Tarun Bhatnagar
Jeromie Wesley Vivian Thangaraj
V. Saravanakumar
Muthusamy Santhosh Kumar
Sriram Selvaraju
Kiran Rade
C.P. Girish Kumar
R. Sabarinathan
Alka Turuk
Smita Asthana
Rakesh Balachandar
Sampada Dipak Bangar
Avi Kumar Bansal
Vishal Chopra
Dasarathi Das
Alok Kumar Deb
Kangjam Rekha Devi
Vikas Dhikav
Gaurav Raj Dwivedi
S. Muhammad Salim Khan
M. Sunil Kumar
Avula Laxmaiah
Major Madhukar
Amarendra Mahapatra
Chethana Rangaraju
Jyotirmayee Turuk
Rajiv Yadav
Rushikesh Andhalkar
K. Arunraj
Dinesh Kumar Bharadwaj
Pravin Bharti
Debdutta Bhattacharya
Jyothi Bhat
Ashrafjit S. Chahal
Debjit Chakraborty
Anshuman Chaudhury
Hirawati Deval
Sarang Dhatrak
Rakesh Dayal
D. Elantamilan
Prathiksha Giridharan
Inaamul Haq
Ramesh Kumar Hudda
Babu Jagjeevan
Arshad Kalliath
Srikanta Kanungo
Nivethitha N. Krishnan
Jaya Singh Kshatri
Alok Kumar
Niraj Kumar
V.G. Vinoth Kumar
G.G.J. Naga Lakshmi
Ganesh Mehta
Nandan Kumar Mishra
Anindya Mitra
K. Nagbhushanam
Arlappa Nimmathota
A.R. Nirmala
Ashok Kumar Pandey
Ganta Venkata Prasad
Mariya Amin Qurieshi
Sirasanambatti Devarajulu Reddy
Aby Robinson
Seema Sahay
Rochak Saxena
Krithikaa Sekar
Vijay Kumar Shukla
Hari Bhan Singh
Prashant Kumar Singh
Pushpendra Singh
Rajeev Singh
Nivetha Srinivasan
Dantuluri Sheethal Varma
Ankit Viramgami
Vimith Cheruvathoor Wilson
Surabhi Yadav
Suresh Yadav
Kamran Zaman
Amit Chakrabarti
Aparup Das
R.S. Dhaliwal
Shanta Dutta
Rajni Kant
A.M. Khan
Kanwar Narain
Somashekar Narasimhaiah
Chandrasekaran Padmapriyadarshini
Krishna Pandey
Sanghamitra Pati
Shripad Patil
Hemalatha Rajkumar
Tekumalla Ramarao
Y.K. Sharma
Shalini Singh
Samiran Panda
D.C.S. Reddy
Balram Bhargava
Tanu Anand
Giridhara R. Babu
Himanshu Chauhan
Tanzin Dikid
Raman R. Gangakhedkar
Shashi Kant
Sanket Kulkarni
J.P. Muliyil
Ravindra Mohan Pandey
Swarup Sarkar
Naman Shah
Aakash Shrivastava
Sujeet K. Singh
Sanjay Zodpe
Anusha Hindupur
P.R. Asish
M. Chellakumar
D. Chokkalingam
Sauvik Dasgupta
M.M.E. Gowtham
Annamma Jose
K. Kalaiyarasi
N.N. Karthik
T. Karunakaran
G. Kiruthika
H. Dinesh Kumar
S. Sarath Kumar
M.P. Sarath Kumar
E. Michaelraj
Josephine Pradhan
E.B. Arun Prasath
D. Gladys Angelin Rachel
Sudha Rani
Amanda Rozario
R. Sivakumar
P. Gnana Soundari
K. Sujeetha
Arya Vinod
author_sort Manoj V. Murhekar
collection DOAJ
description Background: Earlier serosurveys in India revealed seroprevalence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) of 0.73% in May–June 2020 and 7.1% in August–September 2020. A third serosurvey was conducted between December 2020 and January 2021 to estimate the seroprevalence of SARS-CoV-2 infection among the general population and healthcare workers (HCWs) in India. Methods: The third serosurvey was conducted in the same 70 districts as the first and second serosurveys. For each district, at least 400 individuals aged ≥10 years from the general population and 100 HCWs from subdistrict-level health facilities were enrolled. Serum samples from the general population were tested for the presence of immunoglobulin G (IgG) antibodies against the nucleocapsid (N) and spike (S1-RBD) proteins of SARS-CoV-2, whereas serum samples from HCWs were tested for anti-S1-RBD. Weighted seroprevalence adjusted for assay characteristics was estimated. Results: Of the 28,598 serum samples from the general population, 4585 (16%) had IgG antibodies against the N protein, 6647 (23.2%) had IgG antibodies against the S1-RBD protein, and 7436 (26%) had IgG antibodies against either the N protein or the S1-RBD protein. Weighted and assay-characteristic-adjusted seroprevalence against either of the antibodies was 24.1% [95% confidence interval (CI) 23.0–25.3%]. Among 7385 HCWs, the seroprevalence of anti-S1-RBD IgG antibodies was 25.6% (95% CI 23.5–27.8%). Conclusions: Nearly one in four individuals aged ≥10 years from the general population as well as HCWs in India had been exposed to SARS-CoV-2 by December 2020.
first_indexed 2024-12-14T21:55:02Z
format Article
id doaj.art-d50cf56213434e51b4361b33368feaa3
institution Directory Open Access Journal
issn 1201-9712
language English
last_indexed 2024-12-14T21:55:02Z
publishDate 2021-07-01
publisher Elsevier
record_format Article
series International Journal of Infectious Diseases
spelling doaj.art-d50cf56213434e51b4361b33368feaa32022-12-21T22:46:09ZengElsevierInternational Journal of Infectious Diseases1201-97122021-07-01108145155SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020–January 2021Manoj V. Murhekar0Tarun Bhatnagar1Jeromie Wesley Vivian Thangaraj2V. Saravanakumar3Muthusamy Santhosh Kumar4Sriram Selvaraju5Kiran Rade6C.P. Girish Kumar7R. Sabarinathan8Alka Turuk9Smita Asthana10Rakesh Balachandar11Sampada Dipak Bangar12Avi Kumar Bansal13Vishal Chopra14Dasarathi Das15Alok Kumar Deb16Kangjam Rekha Devi17Vikas Dhikav18Gaurav Raj Dwivedi19S. Muhammad Salim Khan20M. Sunil Kumar21Avula Laxmaiah22Major Madhukar23Amarendra Mahapatra24Chethana Rangaraju25Jyotirmayee Turuk26Rajiv Yadav27Rushikesh Andhalkar28K. Arunraj29Dinesh Kumar Bharadwaj30Pravin Bharti31Debdutta Bhattacharya32Jyothi Bhat33Ashrafjit S. Chahal34Debjit Chakraborty35Anshuman Chaudhury36Hirawati Deval37Sarang Dhatrak38Rakesh Dayal39D. Elantamilan40Prathiksha Giridharan41Inaamul Haq42Ramesh Kumar Hudda43Babu Jagjeevan44Arshad Kalliath45Srikanta Kanungo46Nivethitha N. Krishnan47Jaya Singh Kshatri48Alok Kumar49Niraj Kumar50V.G. Vinoth Kumar51G.G.J. Naga Lakshmi52Ganesh Mehta53Nandan Kumar Mishra54Anindya Mitra55K. Nagbhushanam56Arlappa Nimmathota57A.R. Nirmala58Ashok Kumar Pandey59Ganta Venkata Prasad60Mariya Amin Qurieshi61Sirasanambatti Devarajulu Reddy62Aby Robinson63Seema Sahay64Rochak Saxena65Krithikaa Sekar66Vijay Kumar Shukla67Hari Bhan Singh68Prashant Kumar Singh69Pushpendra Singh70Rajeev Singh71Nivetha Srinivasan72Dantuluri Sheethal Varma73Ankit Viramgami74Vimith Cheruvathoor Wilson75Surabhi Yadav76Suresh Yadav77Kamran Zaman78Amit Chakrabarti79Aparup Das80R.S. Dhaliwal81Shanta Dutta82Rajni Kant83A.M. Khan84Kanwar Narain85Somashekar Narasimhaiah86Chandrasekaran Padmapriyadarshini87Krishna Pandey88Sanghamitra Pati89Shripad Patil90Hemalatha Rajkumar91Tekumalla Ramarao92Y.K. Sharma93Shalini Singh94Samiran Panda95D.C.S. Reddy96Balram Bhargava97Tanu AnandGiridhara R. BabuHimanshu ChauhanTanzin DikidRaman R. GangakhedkarShashi KantSanket KulkarniJ.P. MuliyilRavindra Mohan PandeySwarup SarkarNaman ShahAakash ShrivastavaSujeet K. SinghSanjay ZodpeAnusha HindupurP.R. AsishM. ChellakumarD. ChokkalingamSauvik DasguptaM.M.E. GowthamAnnamma JoseK. KalaiyarasiN.N. KarthikT. KarunakaranG. KiruthikaH. Dinesh KumarS. Sarath KumarM.P. Sarath KumarE. MichaelrajJosephine PradhanE.B. Arun PrasathD. Gladys Angelin RachelSudha RaniAmanda RozarioR. SivakumarP. Gnana SoundariK. SujeethaArya VinodICMR National Institute of Epidemiology, Chennai, Tamil Nadu, India; Corresponding author at: ICMR National Institute of Epidemiology, Chennai 600077, India.ICMR National Institute of Epidemiology, Chennai, Tamil Nadu, IndiaICMR National Institute of Epidemiology, Chennai, Tamil Nadu, IndiaICMR National Institute of Epidemiology, Chennai, Tamil Nadu, IndiaICMR National Institute of Epidemiology, Chennai, Tamil Nadu, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaWHO Country Office for India, New Delhi, IndiaICMR National Institute of Epidemiology, Chennai, Tamil Nadu, IndiaICMR National Institute of Epidemiology, Chennai, Tamil Nadu, IndiaIndian Council of Medical Research, New Delhi, IndiaICMR National Institute of Cancer Prevention and Research, NOIDA, Uttar Pradesh, IndiaICMR National Institute of Occupational Health, Ahmedabad, Gujarat, IndiaICMR National AIDS Research Institute, Pune, Maharashtra, IndiaICMR National JALMA Institute for Leprosy and Other Mycobacterial Diseases, Agra, Uttar Pradesh, IndiaState TB Training and Demonstration Centre, Patiala, Punjab, IndiaICMR Regional Medical Research Centre, Bhubaneswar, Odisha, IndiaICMR National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal, IndiaICMR Regional Medical Research Centre, N.E. Region, Dibrugarh, Assam, IndiaICMR National Institute for Implementation Research on Non-Communicable Diseases, Jodhpur, Rajasthan, IndiaICMR Regional Medical Research Centre, Gorakhpur, Uttar Pradesh, IndiaGovernment Medical College Srinagar, Srinagar, Jammu, IndiaState TB Training and Demonstration Centre, Thiruvananthapuram, Kerala, IndiaICMR National Institute of Nutrition, Hyderabad, Telangana, IndiaICMR Rajendra Memorial Research Institute of Medical Sciences, Patna, Bihar, IndiaICMR Regional Medical Research Centre, Bhubaneswar, Odisha, IndiaNational Tuberculosis Institute, Bangalore and Lady Willingdon State TB Centre, Bengaluru, Karnataka, IndiaICMR Regional Medical Research Centre, Bhubaneswar, Odisha, IndiaICMR National Institute of Research in Tribal Health, Jabalpur, Madhya Pradesh, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR National Institute of Nutrition, Hyderabad, Telangana, IndiaICMR National Institute of Research in Tribal Health, Jabalpur, Madhya Pradesh, IndiaICMR Regional Medical Research Centre, Bhubaneswar, Odisha, IndiaICMR National Institute of Research in Tribal Health, Jabalpur, Madhya Pradesh, IndiaState TB Training and Demonstration Centre, Patiala, Punjab, IndiaICMR National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR Regional Medical Research Centre, Gorakhpur, Uttar Pradesh, IndiaICMR National Institute of Occupational Health, Ahmedabad, Gujarat, IndiaState TB Training and Demonstration Centre, Ranchi, Jharkhand, IndiaICMR National Institute for Implementation Research on Non-Communicable Diseases, Jodhpur, Rajasthan, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaGovernment Medical College Srinagar, Srinagar, Jammu, IndiaICMR National Institute for Implementation Research on Non-Communicable Diseases, Jodhpur, Rajasthan, IndiaICMR National Institute of Nutrition, Hyderabad, Telangana, IndiaState TB Training and Demonstration Centre, Thiruvananthapuram, Kerala, IndiaICMR Regional Medical Research Centre, Bhubaneswar, Odisha, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR Regional Medical Research Centre, Bhubaneswar, Odisha, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR Regional Medical Research Centre, Gorakhpur, Uttar Pradesh, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaState TB Office, Hyderabad, Andhra Pradesh, IndiaICMR National JALMA Institute for Leprosy and Other Mycobacterial Diseases, Agra, Uttar Pradesh, IndiaICMR National JALMA Institute for Leprosy and Other Mycobacterial Diseases, Agra, Uttar Pradesh, IndiaState TB Training and Demonstration Centre, Ranchi, Jharkhand, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR National Institute of Nutrition, Hyderabad, Telangana, IndiaNational Tuberculosis Institute, Bangalore and Lady Willingdon State TB Centre, Bengaluru, Karnataka, IndiaICMR Regional Medical Research Centre, Gorakhpur, Uttar Pradesh, IndiaState TB Office, Hyderabad, Andhra Pradesh, IndiaGovernment Medical College Srinagar, Srinagar, Jammu, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR National AIDS Research Institute, Pune, Maharashtra, IndiaState TB Training and Demonstration Centre, Raipur, Chhattisgarh, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaState TB Training and Demonstration Centre, Raipur, Chhattisgarh, IndiaICMR National JALMA Institute for Leprosy and Other Mycobacterial Diseases, Agra, Uttar Pradesh, IndiaICMR National Institute of Cancer Prevention and Research, NOIDA, Uttar Pradesh, IndiaICMR National Institute of Research in Tribal Health, Jabalpur, Madhya Pradesh, IndiaICMR Regional Medical Research Centre, Gorakhpur, Uttar Pradesh, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaState TB Office, Hyderabad, Andhra Pradesh, IndiaICMR National Institute of Occupational Health, Ahmedabad, Gujarat, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR National Institute for Implementation Research on Non-Communicable Diseases, Jodhpur, Rajasthan, IndiaICMR Regional Medical Research Centre, Gorakhpur, Uttar Pradesh, IndiaICMR National Institute of Occupational Health, Ahmedabad, Gujarat, IndiaICMR National Institute of Research in Tribal Health, Jabalpur, Madhya Pradesh, IndiaICMR National Institute for Implementation Research on Non-Communicable Diseases, Jodhpur, Rajasthan, IndiaICMR National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal, IndiaICMR Regional Medical Research Centre, Gorakhpur, Uttar Pradesh, IndiaIndian Council of Medical Research, New Delhi, IndiaICMR Regional Medical Research Centre, N.E. Region, Dibrugarh, Assam, IndiaNational Tuberculosis Institute, Bangalore and Lady Willingdon State TB Centre, Bengaluru, Karnataka, IndiaICMR National Institute of Research in Tuberculosis, Chennai, Tamil Nadu, IndiaICMR Rajendra Memorial Research Institute of Medical Sciences, Patna, Bihar, IndiaICMR Regional Medical Research Centre, Bhubaneswar, Odisha, IndiaICMR National JALMA Institute for Leprosy and Other Mycobacterial Diseases, Agra, Uttar Pradesh, IndiaICMR National Institute of Nutrition, Hyderabad, Telangana, IndiaState TB Office, Hyderabad, Andhra Pradesh, IndiaState TB Training and Demonstration Centre, Raipur, Chhattisgarh, IndiaICMR National Institute of Cancer Prevention and Research, NOIDA, Uttar Pradesh, IndiaIndian Council of Medical Research, New Delhi, IndiaIndependent Consultant, Lucknow, Uttar Pradesh, IndiaIndian Council of Medical Research, New Delhi, IndiaBackground: Earlier serosurveys in India revealed seroprevalence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) of 0.73% in May–June 2020 and 7.1% in August–September 2020. A third serosurvey was conducted between December 2020 and January 2021 to estimate the seroprevalence of SARS-CoV-2 infection among the general population and healthcare workers (HCWs) in India. Methods: The third serosurvey was conducted in the same 70 districts as the first and second serosurveys. For each district, at least 400 individuals aged ≥10 years from the general population and 100 HCWs from subdistrict-level health facilities were enrolled. Serum samples from the general population were tested for the presence of immunoglobulin G (IgG) antibodies against the nucleocapsid (N) and spike (S1-RBD) proteins of SARS-CoV-2, whereas serum samples from HCWs were tested for anti-S1-RBD. Weighted seroprevalence adjusted for assay characteristics was estimated. Results: Of the 28,598 serum samples from the general population, 4585 (16%) had IgG antibodies against the N protein, 6647 (23.2%) had IgG antibodies against the S1-RBD protein, and 7436 (26%) had IgG antibodies against either the N protein or the S1-RBD protein. Weighted and assay-characteristic-adjusted seroprevalence against either of the antibodies was 24.1% [95% confidence interval (CI) 23.0–25.3%]. Among 7385 HCWs, the seroprevalence of anti-S1-RBD IgG antibodies was 25.6% (95% CI 23.5–27.8%). Conclusions: Nearly one in four individuals aged ≥10 years from the general population as well as HCWs in India had been exposed to SARS-CoV-2 by December 2020.http://www.sciencedirect.com/science/article/pii/S1201971221004422SARS-CoV-2COVID-19IgGSeroprevalenceIndia
spellingShingle Manoj V. Murhekar
Tarun Bhatnagar
Jeromie Wesley Vivian Thangaraj
V. Saravanakumar
Muthusamy Santhosh Kumar
Sriram Selvaraju
Kiran Rade
C.P. Girish Kumar
R. Sabarinathan
Alka Turuk
Smita Asthana
Rakesh Balachandar
Sampada Dipak Bangar
Avi Kumar Bansal
Vishal Chopra
Dasarathi Das
Alok Kumar Deb
Kangjam Rekha Devi
Vikas Dhikav
Gaurav Raj Dwivedi
S. Muhammad Salim Khan
M. Sunil Kumar
Avula Laxmaiah
Major Madhukar
Amarendra Mahapatra
Chethana Rangaraju
Jyotirmayee Turuk
Rajiv Yadav
Rushikesh Andhalkar
K. Arunraj
Dinesh Kumar Bharadwaj
Pravin Bharti
Debdutta Bhattacharya
Jyothi Bhat
Ashrafjit S. Chahal
Debjit Chakraborty
Anshuman Chaudhury
Hirawati Deval
Sarang Dhatrak
Rakesh Dayal
D. Elantamilan
Prathiksha Giridharan
Inaamul Haq
Ramesh Kumar Hudda
Babu Jagjeevan
Arshad Kalliath
Srikanta Kanungo
Nivethitha N. Krishnan
Jaya Singh Kshatri
Alok Kumar
Niraj Kumar
V.G. Vinoth Kumar
G.G.J. Naga Lakshmi
Ganesh Mehta
Nandan Kumar Mishra
Anindya Mitra
K. Nagbhushanam
Arlappa Nimmathota
A.R. Nirmala
Ashok Kumar Pandey
Ganta Venkata Prasad
Mariya Amin Qurieshi
Sirasanambatti Devarajulu Reddy
Aby Robinson
Seema Sahay
Rochak Saxena
Krithikaa Sekar
Vijay Kumar Shukla
Hari Bhan Singh
Prashant Kumar Singh
Pushpendra Singh
Rajeev Singh
Nivetha Srinivasan
Dantuluri Sheethal Varma
Ankit Viramgami
Vimith Cheruvathoor Wilson
Surabhi Yadav
Suresh Yadav
Kamran Zaman
Amit Chakrabarti
Aparup Das
R.S. Dhaliwal
Shanta Dutta
Rajni Kant
A.M. Khan
Kanwar Narain
Somashekar Narasimhaiah
Chandrasekaran Padmapriyadarshini
Krishna Pandey
Sanghamitra Pati
Shripad Patil
Hemalatha Rajkumar
Tekumalla Ramarao
Y.K. Sharma
Shalini Singh
Samiran Panda
D.C.S. Reddy
Balram Bhargava
Tanu Anand
Giridhara R. Babu
Himanshu Chauhan
Tanzin Dikid
Raman R. Gangakhedkar
Shashi Kant
Sanket Kulkarni
J.P. Muliyil
Ravindra Mohan Pandey
Swarup Sarkar
Naman Shah
Aakash Shrivastava
Sujeet K. Singh
Sanjay Zodpe
Anusha Hindupur
P.R. Asish
M. Chellakumar
D. Chokkalingam
Sauvik Dasgupta
M.M.E. Gowtham
Annamma Jose
K. Kalaiyarasi
N.N. Karthik
T. Karunakaran
G. Kiruthika
H. Dinesh Kumar
S. Sarath Kumar
M.P. Sarath Kumar
E. Michaelraj
Josephine Pradhan
E.B. Arun Prasath
D. Gladys Angelin Rachel
Sudha Rani
Amanda Rozario
R. Sivakumar
P. Gnana Soundari
K. Sujeetha
Arya Vinod
SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020–January 2021
International Journal of Infectious Diseases
SARS-CoV-2
COVID-19
IgG
Seroprevalence
India
title SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020–January 2021
title_full SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020–January 2021
title_fullStr SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020–January 2021
title_full_unstemmed SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020–January 2021
title_short SARS-CoV-2 seroprevalence among the general population and healthcare workers in India, December 2020–January 2021
title_sort sars cov 2 seroprevalence among the general population and healthcare workers in india december 2020 january 2021
topic SARS-CoV-2
COVID-19
IgG
Seroprevalence
India
url http://www.sciencedirect.com/science/article/pii/S1201971221004422
work_keys_str_mv AT manojvmurhekar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT tarunbhatnagar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT jeromiewesleyvivianthangaraj sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT vsaravanakumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT muthusamysanthoshkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sriramselvaraju sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT kiranrade sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT cpgirishkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rsabarinathan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT alkaturuk sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT smitaasthana sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rakeshbalachandar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sampadadipakbangar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT avikumarbansal sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT vishalchopra sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT dasarathidas sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT alokkumardeb sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT kangjamrekhadevi sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT vikasdhikav sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT gauravrajdwivedi sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT smuhammadsalimkhan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT msunilkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT avulalaxmaiah sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT majormadhukar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT amarendramahapatra sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT chethanarangaraju sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT jyotirmayeeturuk sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rajivyadav sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rushikeshandhalkar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT karunraj sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT dineshkumarbharadwaj sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT pravinbharti sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT debduttabhattacharya sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT jyothibhat sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ashrafjitschahal sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT debjitchakraborty sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT anshumanchaudhury sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT hirawatideval sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sarangdhatrak sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rakeshdayal sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT delantamilan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT prathikshagiridharan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT inaamulhaq sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rameshkumarhudda sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT babujagjeevan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT arshadkalliath sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT srikantakanungo sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT nivethithankrishnan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT jayasinghkshatri sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT alokkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT nirajkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT vgvinothkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ggjnagalakshmi sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ganeshmehta sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT nandankumarmishra sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT anindyamitra sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT knagbhushanam sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT arlappanimmathota sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT arnirmala sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ashokkumarpandey sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT gantavenkataprasad sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT mariyaaminqurieshi sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sirasanambattidevarajulureddy sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT abyrobinson sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT seemasahay sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rochaksaxena sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT krithikaasekar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT vijaykumarshukla sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT haribhansingh sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT prashantkumarsingh sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT pushpendrasingh sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rajeevsingh sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT nivethasrinivasan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT dantulurisheethalvarma sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ankitviramgami sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT vimithcheruvathoorwilson sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT surabhiyadav sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sureshyadav sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT kamranzaman sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT amitchakrabarti sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT aparupdas sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rsdhaliwal sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT shantadutta sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rajnikant sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT amkhan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT kanwarnarain sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT somashekarnarasimhaiah sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT chandrasekaranpadmapriyadarshini sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT krishnapandey sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sanghamitrapati sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT shripadpatil sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT hemalatharajkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT tekumallaramarao sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT yksharma sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT shalinisingh sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT samiranpanda sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT dcsreddy sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT balrambhargava sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT tanuanand sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT giridhararbabu sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT himanshuchauhan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT tanzindikid sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ramanrgangakhedkar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT shashikant sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sanketkulkarni sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT jpmuliyil sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ravindramohanpandey sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT swarupsarkar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT namanshah sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT aakashshrivastava sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sujeetksingh sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sanjayzodpe sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT anushahindupur sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT prasish sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT mchellakumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT dchokkalingam sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sauvikdasgupta sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT mmegowtham sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT annammajose sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT kkalaiyarasi sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT nnkarthik sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT tkarunakaran sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT gkiruthika sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT hdineshkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ssarathkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT mpsarathkumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT emichaelraj sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT josephinepradhan sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ebarunprasath sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT dgladysangelinrachel sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT sudharani sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT amandarozario sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT rsivakumar sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT pgnanasoundari sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT ksujeetha sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021
AT aryavinod sarscov2seroprevalenceamongthegeneralpopulationandhealthcareworkersinindiadecember2020january2021