New CDC data on vaccination/boosters during BA.5 wave for deaths, age 50+ https://t.co/HGyjNwUveD Compared w/unvaccinated: —92% reduction of death for 4 shots —No difference in reduction between 3 and 2 shots (~82%) [that's a 12-fold ⬇️risk of death for 4 shots in July 2022] https://t.co/3JDjCLbEyh