A mother and her newborn at a hospital in Denver, Colorado, in 2025. A new study of 12 million newborns found that a routine birth dose vaccine is rapidly losing ground across US hospitals. | Hyoung Chang/The Denver Post via Getty Images When a baby is born in a hospital in the US, one of the first things that happens — usually within 24 hours — is a hepatitis B shot, which prevents a virus that can cause liver cancer. The newborn shot has been a standard practice nationwide since 1991, after earlier efforts at prevention kept missing the mark. In the decades that have followed, most p...

3 days ago

On HALO