Covid-19 vaccine booster effectiveness wanes after four months but still offers protection, study finds

Booster doses of the Pfizer/BioNTech and Moderna coronavirus vaccines are safe, and they offer high levels of protection against severe Covid-19 even though that protection can wane over time, according to two studies published by the US Centers for Disease Control and Prevention on Friday.

from CNN.com - RSS Channel https://ift.tt/A1IYLqx