A simple, low-tech way to get rid of germs. FatCamera/E+ via Getty Images Leslie S. Leighton, Georgia State University One of the front-line defenses individuals have against the spread of the coronavirus can feel decidedly low-tech: hand-washing. In fact, it was 19th-century Hungarian physician Ignaz Semmelweis who, after observational studies, first advanced the idea of … Continue reading Ignaz Semmelweis, the doctor who discovered the disease-fighting power of hand-washing in 1847