A viral disease is any condition that’s caused by a virus. There are several types of viral disease, depending on the underlying virus. We’ll go over some of the main types, including how they ...

Powassan virus can also cause severe disease, including encephalitis or meningitis, or infection of membranes around the brain and spinal cord. These symptoms can include confusion, ...

Australian man dies from rare infection caused by ‘rabies-like’ bat virus - Fatality is only the fourth case ever recorded in ...

Fifth disease, also known as erythema infectiosum, is a contagious viral illness caused by parvovirus B19. It is most common in children, but it can also affect adults. The main symptom of fifth ...

Deadly viruses throughout history From the Ebola to COVID-19, diseases caused by viruses have killed humans throughout history. Viruses are much older than human beings, possibly even older than ...

Liver disease (hepatic disease) is any disease that negatively affects the normal, healthy performance of the liver. Learn more about types of liver problems and their causes at WebMD.

The CDC finds that leishmaniasis, a skin disease spread by sand flies, is spreading at low levels in the southern U.S. It was previously considered a tropical disease only be acquired abroad.

New research shows that parasitic nematodes, responsible for infecting more than a billion people globally, carry viruses that may solve the puzzle of why some cause serious diseases.