Scientists just discovered that hand sanitizers are completely ineffective at killing the parasite that’s causing weeks of explosive diarrhea in people across the U.S. The microscopic parasite Cyclospora cayetanensis is fueling an unprecedented surge of gastrointestinal infections across the United States, particularly in the Midwest. Since May 1, the Centers for Disease Control and Prevention (CDC) has recorded over 4,173 laboratory-confirmed domestic cases, while tracking more than 7,400 addi