Ever been confused by the names for bird flu or Spanish flu H1N1? Type A influenza has 130 known subtypes, but which ones cause the flu in people? Here’s what the numbers mean. Avid virus-watchers ...

Feb 1 (Reuters) - The H5N1 avian influenza virus has flared up again in recent months, spreading through poultry flocks in Japan, Vietnam and Thailand, killing people in Indonesia and claiming its ...

The dreaded tick-borne encephalitis (TBE) virus infects different types of brain cells in different parts of the brain, depending on whether the affected person's immune system is activated or not.

Viruses share a common ancestor that existed over 3 billion years ago and may even have preceded cellular forms of life, according to a report in the May 3 PNAS by George Rice and colleagues at ...

Diabetes is a lifelong condition that occurs when the body doesn’t make enough insulin, but the reason for this differs between each type of diabetes. Type one diabetes is an autoimmune disease, where ...