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Vaccination is one of the great public health achievements of the last 100 years.1 The development of vaccination has led to the eradication of smallpox, the reduction of the worldwide incidence of polio by 99%, and the control of measles, with a 74% decline in global measles deaths since 2000.2
Goldblatt D, Miller E. Nonspecific Effects of Vaccines. JAMA. 2014;311(8):804-805. doi:10.1001/jama.2014.471