Figure 1.

Trends in overall rate of IPD (invasive pneumonia disease) in different age groups between the years 1998–2016 in the United States. Blue line represents children under five, orange line adults ages 19–64, gray line adults over the age of 65. Important dates for vaccine introduction and recommendations are pinpointed. Data for children less than five was only available through 2015. Figure was constructed with data from the CDC ABCs bacterial surveillance program, 2016 reference 22.