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Many public health experts were opposed to a boosters-for-all approach. The new variant is changing some minds.

Many public health experts were opposed to a boosters-for-all approach. The new variant is changing some minds.

As infections rise, Americans over 18 will be permitted to get extra doses. But it’s not clear boosters really are needed by so many people,...

If the agency’s director signs off, as expected, children ages 5 to 11 could begin to receive the shots this week.

Federal scientists estimated that more than 40 percent of children aged 5 to 11 had been infected with the coronavirus by June. Outside experts aren’t...

“In our hearts, I think people don’t quite agree with this notion of a booster dose,” said one leading vaccine expert.

Recipients of the Moderna and the J.&J. vaccines may receive extra doses, the committee said, although the shots continue to prevent illness and death.

A series of studies found that the Moderna vaccine seemed to be more protective over the long term than the Pfizer-BioNTech vaccine. Here’s why.

Vaccinated kids aged 5 to 11 showed evidence of protection against the virus, the company said. The data must be reviewed by the F.D.A. before...

Independent experts, including government scientists, were skeptical of the research from Israel, which included limited data over a short period.