20 Diseases That Are Almost History Thanks To Vaccines
In 1952, Jonas Salk discovered the polio vaccine. Polio is an attacking disease of nervous system and it was being immunized to 80% of the world’s children in the late 90s, only in Pakistan and Afghanistan where polio remains endemic.
Small pox has been eradicated by vaccines worldwide, the introduction of variolation in England by Lady Mary Wortlet Montagu. It was a devastating disease that was endemic; face-to-face contact with an infected person could infect you, red spots all over the body which became painful together with a bad flu