"An exhaustive 2000 study by CDC and Johns Hopkins scientists published in Pediatrics, the official journal of the American Academy of Pediatrics, concluded, “Thus vaccination does not account for the impressive declines in [infectious disease] mortality seen in the first half of the [20th] century . . . nearly 90 percent of the decline in infectious disease mortality among US children occurred before 1940, when few antibiotics or vaccines were available.” Similarly, a comprehensive 1977 study by McKinlay and McKinlay, formerly required reading in almost all American medical schools, found that all medical interventions, including vaccines, surgeries, and antibiotics, contributed only about 1 percent of the decline and at most 3.5 percent." https://www.factchecker.gr/wp-content/uploads/2017/10/PediatricsDec.2000-VOl... https://www.milbank.org/wp-content/uploads/mq/volume-55/issue-03/55-3-The-Qu...