Topline U.S. officials greenlit second booster doses of the Pfizer-BioNTech and Moderna Covid vaccines last week in an effort to bolster waning immunity ahead of a potential surge of cases driven by t...
Topline U.S. officials greenlit second booster doses of the Pfizer-BioNTech and Moderna Covid vaccines last week in an effort to bolster waning immunity ahead of a potential surge of cases driven by t...