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2-year-olds who were immunized in the United States

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Definitions:  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.

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Data Source: Centers for Disease Control, National Immunization Survey:

Footnotes: Updated April 2020.
A 95 percent confidence interval for each estimate can be found at 2-year-olds who were immunized.