Vaccines have beat back infectious diseases. Bubbles represent reported U.S. cases, but not all diseases were notifiable in all years. For example, mumps was not reported until 1968, the year after a vaccine was licensed. Click or hover on a bubble or a dot on the timeline to view more details.
*Chickenpox data were not reported by all states between 1981 and 2003.
(Graphic) J. You/Science (Data) Centers for Disease Control and Prevention