Recently, researchers found the missing link: the immediate ancestor of the Human Immunodeficiency Virus.

NPR: Origin of AIDS Linked to Colonial Practices in Africa

Scientists were just beginning to identify the human immunodeficiency virus when she graduated from college in Boston.

CNN: Could condoms change the world?

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

These two new cases are reminiscent of the so-called "Berlin patient, " the only person known to have been cured of infection from the human immunodeficiency virus.

MSN: Two more men with HIV now virus-free. Is this a cure?

Pfizer intends to expand the free-drug program to 50 poor countries, which together have an estimated 12 million people who are infected with the human immunodeficiency virus.

FORBES: Doing badly by doing good

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

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