Adolescent girls in sub-Saharan Africa are vulnerable to early unintended pregnancy, HIV, child marriage, sexual violence, female genital mutilation, and related mortality and disabilities. This is particularly the case for those from the poorest homes. Three-quarters of new HIV infections among 15-19 year-olds are in sub-Saharan Africa. Pregnancy-related complications and AIDS are the leading causes of death among adolescents […]

Twenty seconds. That’s how long you need to wash your hands to remove germs, a new physics study confirms. Typical hand-washing guidelines—including those from the U.S. Centers for Disease Control and Prevention—advise scrubbing your hands for a minimum of 20 seconds. To assess that recommendation, researchers used a mathematical model to examine the key mechanics of hand-washing and […]