HIV risk influenced by specific vaginal bacteria
First study author Christina Gosmann - a postdoctoral research fellow at the Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology, and Harvard Medical School - and colleagues report their findings in the journal Immunity.

HIV is a virus that attacks the body' s CD4 cells, or T cells, which are a type of white blood cell that helps to protect the body from infection.

Worldwide, there are around 36.7 million people living with HIV or AIDS. AIDS is the final stage of HIV infection, whereby the immune system is severely damaged.

HIV is most commonly transmitted through sexual activity and needle-sharing. A person can contract HIV through contact with the blood, semen, pre-seminal fluid, or the rectal and vaginal fluids of infected individuals....