I. A World To Change Everyone on this earth has to be grateful to Paul Ehrlich because he made so many advances in medical research. Our life expectancy rate would still be around forty years if Ehrlich hadn’t been interested in chemistry and biology as a young boy. If Ehrlich hadn’t combined so many different chemicals, he would have never combined the chemical known as number 606. Ehrlich helped Emil von Behring find an antitoxin for diphtheria. Diphtheria is a disease that particularly affects children and sometimes leads to death. In 1894, mothers no longer had to worry about their child dying of diphtheria because of Ehrlich’s....

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