Conclusions
During a delta-predominant period in Azerbaijan, point estimates suggest
that primary series CoronaVac protected nearly 1 in 3 HCWs against
COVID-19, but this finding was not statistically significant. Our
findings underscore the need to consider booster doses in individuals
who have received primary series CoronaVac.
Keywords: COVID-19; vaccine effectiveness; vaccination;
healthcare workers; Azerbaijan; CoronaVac