Jonas Salk invented the polio vaccine in 1953 but never patented it. He believed, that like the sun, a vaccine for polio belonged to the people.
Vaccines are biological substances used to stimulate the production of antibodies and provide immunity to disease.
Factoids tagged with "Vaccines"
Malaria would have needed to kill an average of about 5 ½ million a year to kill half of everyone ever, we don’t have data to prove this. However, we know almost half the world’s population is at risk of Malaria and it kills up to a million a year today.