
Hepatitis B virus (HBV) affects the liver. Those who are infected can become lifelong carriers of the virus and may develop long-term problems such as cirrhosis (liver disease) or cancer of the liver. Immunization Schedule Hepatitis B vaccine usually is given as a series of three injections. The first shot is often given to infants shortly after birth. If the mother of a newborn carries the hepatitis B virus in her blood, the infant needs to r