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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.
Vaccines have contributed to a significant reduction in many childhood infectious diseases, such as diphtheria, measles, and Haemophilus influenzae type b (Hib). Some infectious diseases, such as polio and smallpox, have been eliminated in the United States due to effective vaccines.accines work by preparing the bodyâs immune system for future attacks by a certain disease, caused by either viruses or bacteria. Vaccines contain weakened bacteria or viruses, or parts of bacteria or viruses, and mimic these disease-causing agents (which are called antigens).