Hepatitis is an inflammation of the liver. Viruses cause most cases of hepatitis. The type of hepatitis is named for the virus that causes it; hepatitis A, hepatitis B, hepatitis C, hepatitis D and hepatitis E.

Sexually transmitted cases of syphilis are on the rise worldwide. Here are the basics about syphilis all sexually active people need to know to stay safe and reduce the risk of infection.

Vaccination is associated with a nearly halving (40 percent drop) in the risk of Alzheimer’s disease over four years.

Hepatitis is an inflammation of the liver. Viruses cause most cases of hepatitis. The type of hepatitis is named for the virus that causes it; hepatitis A, hepatitis B, hepatitis C, hepatitis D and hepatitis E.