Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
Data reflect the median of state vaccination coverage estimates. Estimates are obtained by combining states’ estimates and weighting the vaccine-specific coverage levels reported by states and territories to their respective birth cohorts. Data are provided for a school year and reflect vaccination status at entry into school. For example, vaccination for the 2009-10 school year reflects vaccination coverage for kindergarteners as of start of the school year in 2009. States may collect and/or report data on selective antigens depending upon school entry requirements.
Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.
In 2013, the original baseline was revised from 95.0 (2007-2008) to 97.2 (2009-2010) because data prior to 2009-2010 could not be appropriately weighted and verified. The target was not revised.
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