People fully vaccinated with the Moderna COVID-19 vaccine appear to have a lower risk of a “breakthrough” infection caused by the Delta variant than those who received the Pfizer vaccine, a new, preliminary report suggests. The researchers...

Since COVID-19 and three vaccines to help prevent it arrived in the United States, questions have swirled about their impact on pregnant women, new moms and infants. How would the virus affect them and their health risks?...

When the antiretroviral regimen known as pre-exposure prophylaxis, or PrEP, was launched nearly a decade ago, patients were suddenly able to achieve near-complete protection against contracting HIV by taking just one pill a day. But there’s a...

The U.S. Food and Drug Administration plans on Thursday to authorize a third “booster” shot of coronavirus vaccine for people with weakened immune systems, as the highly contagious Delta variant surges across the country. Expanding the emergency...

Here’s some of HealthDay’s top stories for Thursday, Aug. 12: FDA to OK booster shot of COVID vaccine for immunocompromised people. About 3% of Americans have weakened immune systems due to various medical conditions, and the standard...

With COVID case counts surging as the school year begins, new research showing that the Moderna vaccine is safe and effective for teens should reassure parents who are on the fence about the shots. “Large trials in...

After a stroke, survivors can greatly increase their odds for many more years of life through activities as easy as a half-hour’s stroll each day, new research shows. The nearly five-year-long Canadian study found that stroke survivors...

THURSDAY, Aug. 12California on Wednesday became the first state to require teachers and other school staff to provide proof of COVID-19 vaccination or else have to undergo weekly tests. The announcement, made by Gov. Gavin Newsom, comes...

New research offers insight into a rare but dangerous inflammatory disease that can occur in children after COVID-19 infection, researchers report. More than 2,600 cases of multisystem inflammatory syndrome in children (MIS-C) have been reported in the...

A third dose of a two-shot COVID vaccine significantly boosts transplant patients’ protection against SARS-CoV-2, according to a new study. “We knew from previous studies that two doses were not enough to produce a good immune response...