Millions of Americans wear jewelry that pierces the ear, nose, lips, tongue and genital areas. But adorning yourself with metal body art can be a health hazard.

Some cancers are actually caused by viruses that linger for long periods in the body, or cause physical damage that later turns cancerous.

The genome of hepatitis D doesn’t resemble any known virus, making its origin a mystery. But by mining virus sequences from genetic datasets, a new study may have found the answer.

The 2020 Nobel Prize for Physiology or Medicine goes to the discoverers of the hepatitis C virus. There's an effective cure but homelessness and the opioid epidemic are driving a surge in infections.