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At present, a variety of new coronavirus mutant strains with immune escape ability appear and spread all over the world.
In this retrospective study, the researchers analyzed the COVID-19 prevalence data of medical staff working in Manaus between January 19 and March 25, 2021.
Of the 53,176 medical workers, 46884 had at least one dose of CoronaVac.
In the discussion session, the researchers pointed out that 49.
Because in this study, nucleic acid testing could not determine how many of the infected patients were indeed infected by the P.
Reference materials:
[1] Chinese COVID-19 vaccine maintains protection in variant-plagued Brazil.
[2] Hitchings et al.