Hepatitis A is a liver disease caused by the hepatitis A virus (HAV). Hepatitis A can occur in situations ranging from isolated cases of disease to widespread epidemics.
Good personal hygiene and proper sanitation can help prevent hepatitis A. Vaccines are also available for long-term prevention of hepatitis A virus infection in persons 12 months of age and older. Immune globulin is available for short-term prevention of hepatitis A virus infection in individuals of all ages. Tests and treatment are also available.