The measles vaccine was invented because it was a common but dangerous disease that could cause inflammation of the brain – and could also be fatal.
polio
How the Salk vaccine works to fight polio (from 1955) By Herman N Bundesen, MD – The Plain Speaker (Hazleton, Pennsylvania) May 13, 1955 The
Every year, hundreds of children were stricken with polio. Before testing iron lung machines on humans, two dozen cats had to die under anesthetic.
