Hepatitis A By Sonal Kumar, MD, MPH, Weill Cornell Medical College Reviewed / Revised Aug 2022 | Modified Sep 2022 View Patient Education Symptoms and Signs Diagnosis Treatment Prevention Key Points More Information Topic Resources Hepatitis A Serology Hepatitis A is caused by an enterically transmitted RNA virus that, in older children and adults, causes typical symptoms of viral hepatitis, including anorexia, malaise, and jaundice.