Second COVID booster shot extends protection for just a few weeks, study shows
Authors: Joseph Wilkinson, New York Daily NewsWed, April 6, 2022, 9:23 PM·2 min read 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 million people age 60 and over in Israel who received their […]