Hepatitis means inflammation of the liver. It can be caused by viruses, bacteria, parasites, autoimmune conditions, reactions to certain drugs, heavy alcohol use, and other toxins.
Hepatitis also refers to a family of viral infections that affect the liver; the five identified infections are caused by viruses labeled A, B, C, D, and E. Each virus has different routes of transmission and different prognoses.
Read more about the causes, transmission, symptoms, diagnosis, treatment, and prevention of viral hepatitis.
Types of Viral Hepatitis
Hepatitis E Virus Infection
Learn how hepatitis E virus is acquired from contaminated food or water. |
NIAID's Role in Viral Hepatitis Research
NIAID has made groundbreaking contributions to the field of hepatitis research. NIAID scientists discovered the hepatitis A and E viruses; developed one of the first diagnostic tests for hepatitis A; and were instrumental in the creation of the hepatitis A vaccine, which is recommended by the CDC for all children over one year of age. Today, NIAID continues its leadership by conducting and supporting research to better understand the development of hepatitis diseases and their effect on the immune system and to develop novel treatments and vaccines against diseases caused by hepatitis viruses. Learn more about NIAID hepatitis research.
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News and Events
Researchers Identify Better Hepatitis C Treatment for People with HIV—July 28, 2004
Key to Hepatitis Virus Persistence Found—April 17, 2003
Cause of Hepatitis A Virulence Pinpointed—Aug. 8, 2002
All Hepatitis News and Events