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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.
Since 1914 to 1977 smallpox killed 300 to 500 million people. By 1970, smallpox still killed 2 million people annually, but OMS managed to eradicate the diseases through vaccination and in the last case was found in Somalia, in 1977. This was possible because smallpox transmits only from human to human. At the time of eradication, no effective cure was known against smallpox.