Impact of Pneumococcal Conjugate Vaccine and the Severity of Winter Influenza-Like Illnesses on Invasive Pneumococcal Infections in Children and Adults

Abstract

PCV7 efficacy and resultant herd-type immunity resulted in a reduction in the rate of IPD not only in young children but also in young and elderly adults. Milder winter respiratory viral seasons may possibly have contributed to the observed reduction in the rate of IPD.