Epidemiological Characteristics of Varicella under Different Immunisation Strategies in Suzhou Prefecture, Jiangsu Province
Background: The varicella vaccine is excluded from the Chinese national immunisation programme but is included in the local expanded programme on immunisation (EPI) in the Suzhou Prefecture. This study investigated the epidemiological characteristics of the varicella cases during the implementation...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Vaccines |
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| Online Access: | https://www.mdpi.com/2076-393X/10/10/1745 |
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| author | Zhuoyu Zhang Na Liu Jun Zhang Juan Xu Wenyu Wang Jiaqi Xiao Tianyu Wang Lin Luan Yunyan Zhang |
| author_facet | Zhuoyu Zhang Na Liu Jun Zhang Juan Xu Wenyu Wang Jiaqi Xiao Tianyu Wang Lin Luan Yunyan Zhang |
| author_sort | Zhuoyu Zhang |
| collection | DOAJ |
| description | Background: The varicella vaccine is excluded from the Chinese national immunisation programme but is included in the local expanded programme on immunisation (EPI) in the Suzhou Prefecture. This study investigated the epidemiological characteristics of the varicella cases during the implementation of different immunisation strategies in the Suzhou Prefecture, Jiangsu Province. Methods: In this study, we used descriptive statistics. Information on reported instances from 2012 to 2021 was first retrieved. Data on varicella cases were collected from the China Information System for Disease Control and Prevention (CISDCP). Similarly, information on vaccinated children was obtained from the Jiangsu Province Vaccination Integrated Service Management Information System (JPVISMIS). The census data in this study was procured from the Suzhou Bureau of Statistics. Results: From 2012 to 2021, a total of 118,031 cases of varicella were reported in Suzhou, and the average annual reported incidence was 91.35 per 100,000. The average yearly incidence after implementing the two-dose varicella vaccination decreased by 41.57% compared with the implementation of one dose. This study demonstrates two annual incidence peaks, a small peak between April and July and a prominent peak between October and January. It is also possible that this seasonal distribution is related to the geography of Suzhou. The average annual reported incidence between districts with a statistically significant difference (χ<sup>2</sup> = 98.077, <i>p</i> < 0.05). The one-dose varicella vaccination coverage gradually increased from 55.34% in 2012 to 89.06% in 2021 and the two-dose varicella vaccination coverage gradually increased from 0.27% in 2012 to 82.17% in 2021. Conclusions: Administering the varicella vaccine in the local EPI has significantly decreased the incidence rate and the total number of cases. A two-dose vaccination schedule is still the best vaccination strategy for varicella vaccine effectiveness. |
| first_indexed | 2024-03-09T19:23:55Z |
| format | Article |
| id | doaj.art-5bc46b655e6442a3b7054cb24b557811 |
| institution | Directory Open Access Journal |
| issn | 2076-393X |
| language | English |
| last_indexed | 2024-03-09T19:23:55Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Vaccines |
| spelling | doaj.art-5bc46b655e6442a3b7054cb24b5578112023-11-24T03:05:20ZengMDPI AGVaccines2076-393X2022-10-011010174510.3390/vaccines10101745Epidemiological Characteristics of Varicella under Different Immunisation Strategies in Suzhou Prefecture, Jiangsu ProvinceZhuoyu Zhang0Na Liu1Jun Zhang2Juan Xu3Wenyu Wang4Jiaqi Xiao5Tianyu Wang6Lin Luan7Yunyan Zhang8School of Public Health, Nanjing Medical University, Nanjing 211166, ChinaSuzhou Center for Disease Control and Prevention, Suzhou 215000, ChinaSuzhou Center for Disease Control and Prevention, Suzhou 215000, ChinaSuzhou Center for Disease Control and Prevention, Suzhou 215000, ChinaSuzhou Center for Disease Control and Prevention, Suzhou 215000, ChinaSuzhou Center for Disease Control and Prevention, Suzhou 215000, ChinaSchool of Public Health, Nanjing Medical University, Nanjing 211166, ChinaSchool of Public Health, Nanjing Medical University, Nanjing 211166, ChinaSuzhou Center for Disease Control and Prevention, Suzhou 215000, ChinaBackground: The varicella vaccine is excluded from the Chinese national immunisation programme but is included in the local expanded programme on immunisation (EPI) in the Suzhou Prefecture. This study investigated the epidemiological characteristics of the varicella cases during the implementation of different immunisation strategies in the Suzhou Prefecture, Jiangsu Province. Methods: In this study, we used descriptive statistics. Information on reported instances from 2012 to 2021 was first retrieved. Data on varicella cases were collected from the China Information System for Disease Control and Prevention (CISDCP). Similarly, information on vaccinated children was obtained from the Jiangsu Province Vaccination Integrated Service Management Information System (JPVISMIS). The census data in this study was procured from the Suzhou Bureau of Statistics. Results: From 2012 to 2021, a total of 118,031 cases of varicella were reported in Suzhou, and the average annual reported incidence was 91.35 per 100,000. The average yearly incidence after implementing the two-dose varicella vaccination decreased by 41.57% compared with the implementation of one dose. This study demonstrates two annual incidence peaks, a small peak between April and July and a prominent peak between October and January. It is also possible that this seasonal distribution is related to the geography of Suzhou. The average annual reported incidence between districts with a statistically significant difference (χ<sup>2</sup> = 98.077, <i>p</i> < 0.05). The one-dose varicella vaccination coverage gradually increased from 55.34% in 2012 to 89.06% in 2021 and the two-dose varicella vaccination coverage gradually increased from 0.27% in 2012 to 82.17% in 2021. Conclusions: Administering the varicella vaccine in the local EPI has significantly decreased the incidence rate and the total number of cases. A two-dose vaccination schedule is still the best vaccination strategy for varicella vaccine effectiveness.https://www.mdpi.com/2076-393X/10/10/1745varicellavaccine coverageimmunisation strategy |
| spellingShingle | Zhuoyu Zhang Na Liu Jun Zhang Juan Xu Wenyu Wang Jiaqi Xiao Tianyu Wang Lin Luan Yunyan Zhang Epidemiological Characteristics of Varicella under Different Immunisation Strategies in Suzhou Prefecture, Jiangsu Province Vaccines varicella vaccine coverage immunisation strategy |
| title | Epidemiological Characteristics of Varicella under Different Immunisation Strategies in Suzhou Prefecture, Jiangsu Province |
| title_full | Epidemiological Characteristics of Varicella under Different Immunisation Strategies in Suzhou Prefecture, Jiangsu Province |
| title_fullStr | Epidemiological Characteristics of Varicella under Different Immunisation Strategies in Suzhou Prefecture, Jiangsu Province |
| title_full_unstemmed | Epidemiological Characteristics of Varicella under Different Immunisation Strategies in Suzhou Prefecture, Jiangsu Province |
| title_short | Epidemiological Characteristics of Varicella under Different Immunisation Strategies in Suzhou Prefecture, Jiangsu Province |
| title_sort | epidemiological characteristics of varicella under different immunisation strategies in suzhou prefecture jiangsu province |
| topic | varicella vaccine coverage immunisation strategy |
| url | https://www.mdpi.com/2076-393X/10/10/1745 |
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