Risk of dispersion or aerosol generation and infection transmission with nasopharyngeal and oropharyngeal swabs for detection of COVID-19: a systematic review by Arnav Agarwal, Bram Rochwerg, Karen EA Burns, Rachel Couban, Srinivas Murthy, Francois Lamontagne, Shannon M Fernando, Janet Diaz, Dipayan Chaudhuri, John Basmaji, Kimia Honarmand, David S Hui, Per O Vandvik, Neill K J Adhikari, Fiona Muttalib, Samira Mubareka, Layla Bakaa, Sonia Brar, David Granton, Devin Chetan, Malini Hu, Charles D Gomersall

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