National Institutes of Health
Niddk: Viral Hepatitis: A Through E and Beyond
Basic information on Hepatitis A, B, C, D, and E. This resource explains how each hepatitis is spread, who is at risk, and prevention and treatment.
WebMD
Web Md: Understanding Hepatitis
This site from WebMD Health contains great information on the various forms of hepatitis, including hepatitis A, hepatitis B, hepatitis C, D and E. Also includes information on diagnostic and test procedures as well.
Centers for Disease Control and Prevention
Centers for Disease Control: Viral Hepatitis
Provides a brief definition, along with information about transmission and vaccinations, for each type of hepatitis.