Protection by a fourth dose of BNT162b2 against Omicron in Israel
Study population For this analysis, we included people who, as of January 1, 2022, were 60 years of age or older and had received three doses of BNT162b2 at least 4 months before the end of the study period (March 2). We excluded the following people from the analysis: those who died before the start … Read more