Additional File 1.

"Methods: Vaccine doses administered in the public sector" and "Results: Doses Administered". Minnesota and Pennsylvania state health departments provided data on doses of diphtheria-tetanus-pertussis (DTP or DTaP), poliovirus, and measles-mumps-rubella vaccines (MMR) administered in their respective states for the years 1994–2003. Immunization rates for these states for the years 1994–2003 were obtained from the National Immunization Survey. These data are graphed by year in Figures 2 and 3.

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Zimmerman et al. BMC Public Health 2006 6:7   doi:10.1186/1471-2458-6-7