The research, presented at the Conference on Retroviruses and Opportunistic Infections in Boston this week, was conducted by physicians and scientists of the University of Washington and the University of Rochester Medical Centre to learn more about how the HIV virus survives and spreads from person to person.

The Lactobacillus bacteria, commonly found in the vagina of most women, produce hydrogen per-oxide(H2O2) inside the body which hinders spread of the Human Immunodeficiency Virus, responsible for causing AIDS, the researchers found.

According to experts, vagina is one of the most common routes for the viruses causing Sexually Transmitted Diseases (STDs), including AIDS.