The growing consensus that at least some Americans will need a booster is partly tied to research suggesting that Pfizer’s vaccine is less effective after about six months.The growing consensus that at least some Americans will need a booster is partly tied to research suggesting that Pfizer’s vaccine is less effective after about six months.Vaccination and Immunization, Coronavirus (2019-nCoV), Clinical Trials, Centers for Disease Control and Prevention, Food and Drug Administration, Pfizer Inc, Moderna Inc, Johnson & Johnson, Offit, Paul ARead More
