F.D.A. Clears Johnson & Johnson’s Shot, the Third Vaccine for U.S.

The authorization of a third Covid-19 vaccine will bring millions more doses within days. But health officials worry that some people will see the vaccine as the inferior choice. WASHINGTON — The Food and Drug Administration on Saturday authorized Johnson & Johnson’s single-shot Covid-19 vaccine for emergency use, beginning the rollout of millions of doses of a third effective vaccine that could reach Americans by early next week….more: nytimes