For the 2009-10 school year, vaccination coverage levels for children enrolled in kindergarten were available from 46 grantees. The number of children enrolled in kindergarten with an exemption for medical, religious, or philosophical reasons was available from 47 grantees. All of the reporting grantees assessed public schools, and all but North Dakota and Wisconsin included private schools in their assessment. Although  grantees assessed all schools with a kindergarten class, a smaller group (Delaware, Georgia, Hawaii, Missouri, Nevada, New Mexico, [North Dakota,] Rhode Island, South Carolina, Virginia, and Wisconsin) assessed a random sample of schools, and Alaska assessed a nonrandom sample of schools. For grantees that submitted reports for <95% of enrolled students, data were weighted based on population.