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These trailblazers transformed medicine, bringing the treatments and cures to save the lives of millions. Variola is the virus that causes smallpox, producing fever and rashes.
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Edward Jenner In the 18th century, England’s deadliest disease was SMALLPOX. English doctor Edward Jenner found that introducing a mild dose of cowpox (a similar, less dangerous disease) prepared the human body to fight smallpox. In 1796, Jenner’s smallpox vaccine became the world’s first successful vaccine, eventually helping to wipe out the disease.
Jonas Salk American microbiologist Jonas Salk developed the first effective polio vaccine after years of medical research and testing. Declared safe in 1955, more than 200 MILLION VACCINES were administered in the USA in the following two years. Polio, which usually affects young children, has now been eradicated in all but a handful of countries. cks the The polio virus atta to paralysis. spinal cord, leading
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