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Despite the success of vaccines, only one of these diseases â smallpox â has been erased from the globe. Because of vaccines, 12 deadly diseases can be cured including the chicken pox, diphtheria, Invasive H. flu, Malaria, Pneumococcal disease, polio, tetanus, typhoid fever, Yellow fever and smallpox.
12 Deadly Diseases Cured in the 20th Century. by the Editors of Publications International, Ltd. Chicken pox, diphtheria, and polio are only a few of the devastating diseases that have been managed with vaccines in the 20th century. According to the U.S. Census Bureau, the average life expectancy at the beginning of the 20th century was 47.3 years. A century later, that number had increased to 77.85 years, due largely to the development of vaccinations and other treatments for deadly diseases.