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2. National, regional, state, and selected local area vaccination coverage among children aged 19–35 months–United States, 2013;Elam-Evans;MMWR Morb Mortal Wkly Rep,2014
3. National, state, and local area vaccination coverage among children aged 19–35 months - United States, 2012;Centers for Disease Control and Prevention (CDC);MMWR Morb Mortal Wkly Rep,2013
4. Patterns of Rotavirus Vaccine Uptake and Use in Privately-Insured US Infants, 2006–2010
5. Healthy People 2020. U.S. Department of Health and Human Services, Office of Disease Prevention and Health Promotion. Available at: https://www.healthypeople.gov/2020/topics-objectives/topic/immunization-and-infectious-diseases/objectives. Accessed January 29, 2016.