Powerful federal advisers this week are expected to make a controversial change to how babies are immunized against hepatitis B, and to question how pediatricians inoculate children against more than ...

John Ellis was 16 when frequent stomach pains led to an unexpected diagnosis.

Delaying the birth dose by just two months could result in at least 1,400 additional preventable cases of hepatitis B for each year the revised recommendation is in place, according to a new analysis.