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debeloped vaccine
Edward Jenner developed a vaccine for smallpox in 1796 -
American Red Cross
Clara Barton is the founder of the American Red Cross -
discovered x-rays
William Roentagen discovered x-rays in 1895 -
isolated radium
Marie Cureie isolated radium in 1910 -
discovered penicillin
Sir Alexander Fleming discovered penicillin in 1928 -
plio vaccine
Gabriel Fahrenheit developed the pilio vaccine in 1952