Source: The Centers for Disease Control and Prevention http://www.cdc.gov
3. Who should get hepatitis B vaccine and when
- Everyone 18 years of age and younger
- Adults over 18 who are at risk
Adults at risk for hepatitis B virus infection include people who have more than one sex partner, men who have sex with other men, injection drug users, health care workers, and others who might be exposed to infected blood or body fluids.
If you are not sure whether you are at risk, ask your doctor or nurse.
People should get 3 doses of hepatitis B vaccine according to the following schedule. If you miss a dose or get behind schedule, get the next dose as soon as you can. There is no need to start over.
An infant whose mother is infected with hepatitis B virus
- First dose: Within 12 hours of birth
- Second dose: One to two months of age
- Third dose: Six months of age
An infant whose mother is not infected with hepatitis B virus
- First dose: Birth to two months of age
- Second dose: One to four months of age (at least one month after first dose)
- Third dose: Six to 18 months of age
Older child, adolescent, or adult
- First dose: Any time
- Second dose: One to four months after first dose
- Third dose: four to six months after first dose
- The second dose must be given at least 1 month after the first dose.
- The third dose must be given at least 2 months after the second dose and at least 4 months after the first.