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Hepatitis A and B Vaccines


How Effective Are the Vaccines for Hepatitis A and Hepatitis B, and Are They Safe? continued...

As with all medications, there is the potential for side effects. But the safety record of both vaccines is outstanding. The most common side effect of the hepatitis B vaccine is soreness at the site of the injection. Since 1982, when the hepatitis B vaccine became available in the U.S., more than 100 million people have been vaccinated with no report of serious side effect. In that same time period, the incidence of acute hepatitis B declined by about 82%.

Mild side effects for the hepatitis A vaccine include soreness at the injection site, headache, loss of appetite, and tiredness. Serious side effects include a severe allergic reaction within a few minutes to a few hours of receiving the shot, but such occurrences are extremely rare.

Who Should Get the Hepatitis A Vaccine?

The CDC recommends that all children between ages 12 months and 23 months be vaccinated with the hepatitis A vaccine. No vaccine for hepatitis A is licensed in the U.S. for children under the age of 1. In addition, the following people are considered at risk for hepatitis A and should be vaccinated:

  • People ages 1 year and older who are traveling to or working in countries with a high or intermediate incidence of hepatitis A
  • Children and adolescents through age 18 who live in states or communities that have implemented routine vaccination because of a high rate of disease
  • Men who have sex with men
  • Anyone who uses street drugs
  • Anyone with chronic liver disease
  • Anyone treated with clotting factor concentrates, such as people with hemophilia
  • Anyone who works with HAV-infected primates or in HAV research laboratories

You should not get the vaccine if you have ever had a severe allergic reaction to an earlier dose of the vaccine. You should also tell your doctor about any allergies you have and not get vaccinated if you are allergic to any component to the vaccine. Also, the safety of the vaccine for pregnant women is not known, although the risk is considered to be very low.

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