Many diseases and conditions are spread by not washing hands with soap and clean, running water. If clean, running water is not accessible, as is common in many parts of the world, use soap and available water.
Riverdale covers about three square miles in area. It has one of the highest elevations in New York City, affording it views of the Empire State Building, George Washington Bridge, Hudson River and New Jersey Palisades.
Since the actual New York City neighborhood of Riverdale is near the Bronx Zoo, this could provide a clue as to the fictional Riverdale's location. Another view is that Riverdale, and many of the characters and sites are based on Haverhill, Massachusetts, hometown of Archie creator Bob Montana. A replica of Auguste Rodin's statue The Thinker sits in front of both Haverhill High School and Riverdale High School.