U.S. Fda Authorizes 4Th Dose Of Pfizer Covid 19 Shot For Americans 50 And Up
The US Food and Drug Administration has also approved this additional booster of the vaccine for people 12 years of age and older with a weakened immune system. The new supplements should be given at least four months after the third dose and are intended to offer greater protection against serious illness and hospitalization, the companies said. The authorization comes as some scientists have expressed concerns about the highly contagious BA....