These days, most people are vaccinated against measles, a highly contagious, life-threatening respiratory virus, when they ...

New recommendations suggest certain adults may need additional protection as measles outbreaks continue to spread nationwide.

Scientists have found that receiving a COVID-19 booster shot in the same arm as the initial dose triggers a faster and more effective immune response, thanks to primed macrophages in nearby lymph ...

The U.S. Health and Human Services Department says it will require placebo testing of "all new vaccines," raising questions ...

With two confirmed measles cases in Travis County and a large outbreak in West Texas, do you need a measles booster? Here's ...

The plans amount to an extraordinary flex of Robert F. Kennedy Jr.’s power as health secretary to make decisions ordinarily ...

Robert F. Kennedy Jr., who has for years voiced concerns about vaccine safety, is ordering a notable change to testing at his ...

Researchers have reasoned that getting jabbed in the same arm works better because immune cells in nearby lymph nodes, which ...

Health and Human Services Secretary Robert F. Kennedy Jr. Is changing the way vaccines are tested and will now require all ...

As cases of whooping cough rise, CNN wellness expert Dr. Leana Wen explains what causes the respiratory illness, how it ...

Dr. Marty Makary, chief of the FDA, has expressed doubts about the agency approving the COVID-19 vaccine for winter, stating ...

Same-arm booster shots trigger a stronger early immune response than shots given in the opposite arm, leading to higher ...