백신 도입 이후 홍역 케이스

Vaccines for prevention of measles, rubella, and mumps were licensed and recommended for use in the United States in the 1960s and 1970s. After the introduction of the 1-dose measles vaccination program, the number of reported measles cases decreased during the late 1960s and early 1970s to approximately 22,000–75,000 cases per year (Figure 1) 

1960-1970년대 백신 도입 이후 급감한 홍역 케이스입니다.
그럼에도 백신의 효과를 믿지 않은 사람들이 있으니…….

REF. https://www.cdc.gov/mmwr/pdf/rr/rr6204.pdf