Hepatitis A and hepatitis E viruses are known as "hit-and-run" viruses. They do not attempt to combat the immune system. After they get to the liver cells (hepatocytes), they replicate quickly in the hepatocytes injuring them prior to the immune response takes effect. Their escape plan is to get
into the intestines through the bile duct and exiting the intestines with feces. The predominant route of transmission is fecal/oral.
