French scientist Luc Montagnier, who won the Nobel Prize in Physiology or Medicine in 2008, has died at 89. He shared the Nobel for discovery of human immunodeficiency virus (HIV), that causes AIDS, with his colleague Françoise Barré-Sinoussi. In 2020, Montagnier had claimed that COVID-19 was laboratory-made and was a result of an attempt to make vaccines against AIDS virus.