Change Indicator

2-year-olds who were immunized in South Dakota

2-year-olds who were immunized

Definition and Source



 4:3:1:3:3:1 immunization coverage. Depending on the brand of vaccine used, a child would either get 3 doses of Hib plus a booster, or 2 doses of Hib plus a booster; at the state-level, the CDC no longer reports Hib simply as 3 or more doses but instead specifies that the “full series” was received.

Between December 2007 and September 2009 there was a shortage of the Hib vaccination which lead to a temporary suspension of the booster shot for most children in the U.S. This explains the dip in full-coverage in 2009 and 2010, which rebounded by 2011.

For more information please see:

Data Source

Centers for Disease Control, National Immunization Survey:


Updated January 2022.
A 95 percent confidence interval for each estimate can be found at 2-year-olds who were immunized.

Last Updated

January 2022