Pfizer-BioNTech’s vaccine gets slightly weaker over time, company data shows, but remains strong in preventing severe disease.

With cases rising in the U.S., the findings may influence the Biden administration’s deliberations about delivering a booster shot.With cases rising in the U.S., the findings may influence the Biden administration’s deliberations about delivering a booster shot.Coronavirus (2019-nCoV), Vaccination and Immunization, Research, Disease Rates, Pfizer Inc, BioNTech SERead More