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C.D.C. advisers are expected to discuss rare heart problems in vaccinated younger people.

C.D.C. advisers are expected to discuss rare heart problems in vaccinated younger people.

Younger adults are less likely to get vaccinated than their elders, new C.D.C. studies say.

Without access to health care, undocumented immigrants turn to expensive, unproven cures.

Why make a virus more transmissible? To learn how to fight it.

Some people should get antibody tests after vaccination. You’re probably not one of them.

Brazil reported one of the highest Covid death tolls in the world.

Without access to health care, undocumented immigrants are turning to expensive, unproven cures.

Without access to health care, undocumented immigrants are turning to expensive quack cures.

Parents and caregivers reported mental health issues more often than others during the pandemic, a C.D.C. study says.

CureVac’s mRNA vaccine reaches an efficacy level of just 47 percent in a clinical trial.

CureVac’s mRNA vaccine reaches an efficacy level of just 47 percent in a clinical trial.

The virus appeared in five U.S. states sooner than thought, scientists reported.

Judge dismisses Houston hospital workers’ lawsuit over vaccination mandate.

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

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.

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

Those reports of severe Covid and deaths among the vaccinated? They’re rare, and not unexpected.