Hepatitis A is an acute infectious disease of liver caused by Hepatitis A virus (HAV). It results in the inflammation of liver due to infection, certain medications, alcohol, chemicals, etc. HAV is a single stranded positive sense, linear RNA enterovirus and a member of Picoraviridae family. It is generally found in the faeces of people infected with hepatitis A virus.
About 10 million people all over the world are affected by Hepatitis A annually. Infection can occur at any age but is more common in younger groups. It is more commonly seen in countries where there is poor sanitation and drainage infrastructure. In United States over half of all acute liver disease is caused by Hepatitis A virus.