Infants and young children infected with hepatitis A will rarely show symptoms of infection and may appear quite well, or have only mild symptoms. The majority of adults will show symptoms.
Pregnant women should delay being immunised against hepatitis A until after the pregnancy, unless there is a substantial risk of them being exposed to the virus. People who are in close household or sexual contact with someone with hepatitis A should receive normal human immunoglobulin within two weeks of exposure. Administration of the immunoglobulin will prevent infection for approximately six weeks.
Hepatitis A vaccine can be given at the same time as the immunoglobulin.