CDC scientists admit that 90% of infectious disease mortality decrease in the United States happened before vaccines were available.
Bernard Guyer, MD, Mary Anne Freeman, MA, Donna M. Strobino, PhD, Edward J. Sondik, PhD. Pediatrics, Dec 2000, Vol. 106, No. 6.
“Thus vaccination does not account for the impressive declines in mortality seen in the first half of the century…nearly 90% of the decline in infectious disease mortality among US children occurred before 1940, when few antibiotics or vaccines were available.”
Infectious disease rates declined precipitously in the united states in the 20th century before the implementation of a national vaccine program.
Gregory L. Armstrong, MD, Laura A. Conn, MPH, Robert W. Pinner, MD. Journal of the American Medical Association, 1999, 281: 61-66.
“During the first 8 decades of the 20th century, the infectious disease mortality rate in the United States declined substantially…Improvements in living conditions, sanitation, and medical care probably accounted for this trend.”