What’s the biggest public health disaster in American history?
The polio epidemic is a good guess. It crippled more than 300,000 and killed about 20,000 in the U.S. before a vaccine was developed in the 1950s.
AIDS took a terrible toll, too. Nearly 700,000 people have died from the disease in the U.S. since the 1980s.
The Spanish flu outbreak of 1918 is less known.