What about viruses? Would you consider them living or nonliving? Let’s look closely at the life cycle of the human immunodeficiency virus (HIV) – the virus that causes AIDS – to find out. This ...

HIV-1 strains in humans arose from three independent ape-to-human transmissions in the early 20th century, but the viral adaptation in humans remained unknown until now. Paul Sharp and colleagues from ...

Any donation you make helps us continue our work towards a world where HIV is no longer a threat to health or happiness ... Other strains of HPV can lead to cervical or anal cancer. The human ...