2nd COVID booster shot extends protection for just a few weeks, study shows - Bangor Daily News
4/8/2022 12:00:00 AM3 yearsago
by Tribune Content Agency
by Tribune Content Agency
Only about 30 percent of the U.S. population, 98 million people, has received a third dose.
A fourth shot of the Pfizer COVID-19 vaccine increased protection against viral infection for only four to seven weeks, according to a massive study published Tuesday. The study included 1.25 millio… [+1733 chars]
full article...