Pfizer COVID-19 vaccine efficacy drops to 84% after 6 months, preprint study suggests
https://healthell.blogspot.com/2021/07/pfizer-covid-19-vaccine-efficacy-drops.html
Pfizer COVID-19 vaccine efficacy drops to 84% after 6 months, preprint study suggests
A new study involving the Pfizer-BioNTech COVID-19 vaccine suggests the jab’s efficacy drops to around 84% about six months after the second dose.
