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Novavax Offers U.S. a Fourth Strong Covid-19 Vaccine

Judge dismisses Houston hospital workers’ lawsuit over vaccination mandate.

F.D.A. Still Lacks a Permanent Chief, Despite Pressing, Weighty Problems

The C.D.C. is investigating nearly 800 cases of rare heart problems following immunization.

How to Reopen Offices Safely

Three F.D.A. Advisers Resign Over Agency’s Approval of Alzheimer’s Drug

The C.D.C. urges parents to get childhood vaccinations up to date following a steep decline last year.

The C.D.C. urges parents to get childhood vaccinations up to date following a steep decline last year.

Widespread vaccination of adults helps protect unvaccinated children, according to a new Israeli study.

The C.D.C.’s New Leader Follows the Science. Is That Enough?

Outcry Forces UnitedHealthcare to Delay Plan to Deny Coverage for Some E.R. Visits

Moderna applies for U.S. authorization of its vaccine for use in adolescents.

Jessica Morris, Whose Brain Cancer Was Her Cause, Dies at 57