FDA Further Limits Johnson & Johnson Covid Vaccine The agency said the move reflected an updated analysis of the risk of a rare but serious blood-clotting condition in people who get the vaccine.
F.D.A. Allows Second Coronavirus Boosters for Everyone 50 and Older People in the age group can get the additional shot at least four months after their first booster. Those 12 and older with certain immune deficiencies are also eligible.