English: Measles cases reported in the United States, 1944-2007, represented as thousands of cases per year vs. year, with an inset 1983-2007 as cases vs. year. 1983 was chosen for the beginning of the inset graph as it represents the minimum reported cases until 1993, after the booster vaccine was added to the recommendations schedule. Data are from the US Centers for Disease Control.

Cases 1944-1993 are reported in: Centers for Disease Control and Prevention Summary of notifable diseases—United States, 1993 Published October 21, 1994 for Morbidity and Mortality Weekly Report 1993; 42(No. 53)

Cases 1976-2007 are reported in: Centers for Disease Control and Prevention Summary of notifable diseases—United States, 2007 Published July 9, 2009 for Morbidity and Mortality Weekly Report 2007; 56(No. 53)

Date the measles vaccine was licensed (1963) and date the booster vaccine was added to the recommendations schedule (1989) are from:

Centers for Disease Control and Prevention. Epidemiology and Prevention of Vaccine-Preventable Diseases. Atkinson W, Wolfe S, Hamborsky J, McIntyre L, eds. 11th ed. Washington DC: Public Health Foundation, 2009