Substantial Proportion of U.S. Measles Cases Intentionally Unvaccinated

Summary of Research: Unvaccinated or undervaccinated individuals comprised substantial proportions of cases in measles and some pertussis outbreaks, an analysis of numerous studies and reports finds. Additionally, vaccine refusal was associated with an elevated risk for measles and pertussis, including among fully vaccinated individuals, researchers report.

Primary Research: Varun K. Phadke, Robert A. Bednarczyk, Daniel A. Salmon, Saad B. Omer. Association Between Vaccine Refusal and Vaccine-Preventable Diseases in the United States. JAMA, 2016; 315 (11): 1149 DOI: 10.1001/jama.2016.1353
Matthew M. Davis. Toward High-Reliability Vaccination Efforts in the United States. JAMA, 2016; 315 (11): 1115 DOI: 10.1001/jama.2016.1529

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