Israel is in the midst of a massive, emergency immunization drive of all children under the age of 9 against polio.
Health workers detected the virus in southern Israel in February. Since then, they've found it in 85 different sewage samples across the country, the Global Polio Eradication Initiative said Wednesday. Yet so far, no children have gotten sick or been paralyzed by the virus.
When you go to the Dead Sea for a float in its extraordinarily buoyant waters, signs warn you not to drink a drop. "Did you swallow water?" one Dead Sea do's and don'ts list asks. "Go immediately to the lifeguard."