Pre-exposure prophylaxis (or PrEP) is a way for people who do not have HIV but who are at very high risk of getting HIV to prevent HIV infection by taking a pill every day.

Bacterial vaginosis is a common, non sexually transmitted vaginal infection causing discharge and foul-smelling odor.

While not as common as HPV, chlamydia, and herpes, trichomoniasis affects 174 million people infected around the world each year.

Vaccination is associated with a nearly halving (40 percent drop) in the risk of Alzheimer’s disease over four years.