Since the human immunodeficiency virus (HIV) was identified in 1983, roughly 91.4 million people around the world have contracted the virus and an additional 44.1 million have died from related causes. Currently, nearly 40 million people worldwide are living with HIV-1, the version of the virus that causes more than 95% of infections. While significant progress has been made in HIV vaccine research, according to Penn State Professor Dipanjan Pan, there is currently no approved vaccine for HIV.

