P PSForever Member Oct 7, 2021 #1 https://www.yahoo.com/news/pfizers-covid-19-immunity-protection-032404881.html Last edited: Dec 30, 2023
C CalBears96 Well-known member Oct 7, 2021 #2 We already knew that the effectiveness of all the vaccines for COVID-19 would decrease over time. Expectations were 6 months and we would need a booster shot after that.
We already knew that the effectiveness of all the vaccines for COVID-19 would decrease over time. Expectations were 6 months and we would need a booster shot after that.