Scientists have discovered a human antibody that protected mice from infection with the deadliest malaria parasite, Plasmodium falciparum. The research findings provide the basis for future testing in humans to determine if the antibody can provide short-term protection against malaria, and also may aid in vaccine design. Investigators at the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health, led the research with colleagues at the Fred Hutchinson Cancer Research Center in Seattle.

Nearly 90 percent of participants in an open-label study of a vaginal ring infused with a drug to prevent HIV are using the monthly ring at least some of the time, according to an interim analysis of study data. In addition, the rate of HIV infection among participants in the open-label study, which has no placebo arm for comparison, is half of what might be expected in the absence of the ring, according to mathematical modeling that has significant limitations.

Africa and the Middle East are at a tipping point for avoiding epidemic numbers of preventable morbidity and mortality.

Estrogen replacement therapy typically is recommended (assuming there is no medical reason not to use estrogen) until the average age of natural menopause — usually around 51. This is done mainly to reduce the risk of long-term health problems associated with removal of the ovaries. To ensure you’re receiving the right dose, it’s a good idea to have your estrogen level checked at least once a year, and eight to 12 weeks after any dose changes.

No, fibrocystic breast changes don't increase your risk of breast cancer.

You can be contagious from a few days up to two weeks or more, depending on which virus is causing your stomach flu (gastroenteritis).