Dr. Robert Gallo, co-discoverer of the human immunodeficiency virus (HIV) that causes AIDS, said last week there was a "serious possibility" no vaccine would ever be discovered.

CNN: Clinton's challenge: Find AIDS vaccine by 2007

Just as the human immunodeficiency virus, or HIV, does in people, FIV works by wiping out infection-fighting T-cells.

BBC: Glowing cats shed light on Aids

Nature Medicine carried a report by Jean-Christophe Plantier of the University of Rouen and his colleagues of a new human immunodeficiency virus (HIV) detected in a Cameroonian woman.

ECONOMIST: Human malaria started in chimpanzees