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Impact of PCV7 vaccine on invasive pneumococcal disease among children <5 years of age, 1998–2009a
aPilishvili T, Lexau C, Farley MM, Hadler J, Harrison LH, Bennett NM, et al. Sustained reductions in invasive pneumococcal disease in the era of conjugate vaccine. J Infect Dis 2010;201:32-41.
PCV = pneumococcal conjugate vaccine
