Viral hepatitis is primarily a contagious liver disease, mainly including hepatitis A, B, C, D, E, and others. There are also liver impairments caused by viruses other than these, which also fall under the category of viral hepatitis. Viral hepatitis is contagious, and its transmission routes vary by type. For example, the main transmission route for both hepatitis A and E, which are caused by the hepatitis A and E viruses, is fecal-oral, i.e., through the digestive tract. The primary transmission route for hepatitis B is through blood and bodily fluids, and mother-to-child transmission is also an important pathway for the spread of hepatitis B. The transmission route for hepatitis C mainly involves blood transfusions or blood products. Thus, the pathways of infection differ for each type of hepatitis.