Hepatitis B vaccines given at birth have essentially eliminated the disease in kids. A vote this week could upend that success.

Prasad was hired by Health Secretary Robert F. Kennedy Jr., a long-time anti-vaccine activist, who has been working to remake U.S. vaccine policy and has called for placebo-based trials of vaccines in the past. Many scientists say it is not typically possible to run such trials for ethical reasons.

Edward Jenner was able to formulate a makeshift smallpox vaccine all the way back in 1798, but even back then, people weren’t very normal about it. Skeptics spread alarming propaganda, claiming the medicine (which did protect many people from falling dangerously ill) would turn children into cow-like demon creatures and make them very sick.

One dose of a bivalent or nonavalent HPV vaccine was noninferior to two doses, the randomized ESCUDDO trial found. Vaccine effectiveness was at least 97% against HPV16 or 18 infection no matter whether a participant received one or two doses of the bivalent or nonavalent vaccine.

FDA chief medical officer Vinay Prasad told reporters that the agency would be changing its vaccine approval process.

A new study suggests a single HPV vaccination appears just as effective as two doses at preventing the viral infection that causes cervical cancer.

Governor Maura Healey warned of misinformation about the childhood vaccine schedule, especially the infant hepatitis B vaccine, ahead of a meeting of the CDC's vaccine advisory panel.

By blocking a molecule that pushes the immune system into overdrive, a vaccine protects mice from life-threatening anaphylaxis