The effectiveness of primary series CoronaVac vaccine in preventing COVID-19 illness: A prospective cohort study among healthcare workers in Azerbaijan, May-November 2021.
Mark A KatzMadelyn Yiseth Rojas CastroNabil SeyidovM Trent HerdmanSamir MehdiyevC Jason McKnightAlina GuseinovaRadu CojocaruJason DoranBarbara MühlemannChristian DrostenJavahir SuleymanovaRichard PebodyEsther KisslingGahraman HagverdiyevPublished in: Influenza and other respiratory viruses (2023)
During a period in Azerbaijan characterized by mostly Delta circulation, VE point estimates suggested that primary series CoronaVac protected nearly 1 in 3 HCWs against COVID-19, but 95% confidence intervals were wide, with lower bounds that crossed zero, reflecting the limited precision of our VE estimates. Our findings underscore the need to consider booster doses for individuals who have received the primary series of CoronaVac.