A single dose also cuts the number of asymptomatic infections, according to preliminary research in the U.K. which has not yet been peer-reviewed.
The results, from a mass vaccination campaign in Israel, give reassurance that the benefits seen in testing persisted when the vaccine was used much more widely.
The FDA's panel of experts will meet Friday to decide whether to approve the coronavirus shot.
President Joe Biden offered an optimistic estimated timeline for Americans to move past the coronavirus pandemic.
More than 38 million people in the U.S. have now received at least one dose of the Pfizer vaccine or another made by Moderna.
President Joe Biden says the timeline for achieving herd immunity is longer than the Trump administration had indicated.
Experts break down the Moderna, Pfizer, Novavax, Johnson & Johnson and AstraZeneca coronavirus shots, including efficacy, storage needs and more.
Here's what to do if you can't get your second coronavirus shot on time and how it affects immunity.
If successful, that would increase the national supply by 50% ― enough to vaccinate nearly the entire U.S. population by the end of summer.
Blood from vaccinated subjects neutralized lab-created pseudo-viruses that mimicked the variant, a preliminary study found.