Healthcare professionals administer the hepatitis A vaccine in two doses. They give the first dose when the infant is between 12 and 23 months old and the second dose 6 months after the first. The ...

Public health experts warn any delay to the newborn dose of the hepatitis B vaccine could threaten decades of progress.

Los Angeles County is facing a community-wide outbreak of the contagious virus hepatitis A, citing a sustained increase in clinical cases and elevated virus levels detected in wastewater testing. The ...