Decline in early childhood respiratory tract infections in the Norwegian mother and child cohort study after introduction of pneumococcal conjugate vaccination

Magnus MC, Vestrheim DF, Nystad W, Håberg SE, Stigum H, London SJ, Bergsaker MA, Caugant DA, Aaberge IS, Nafstad P. Decline in early childhood respiratory tract infections in the Norwegian mother and child cohort study after introduction of pneumococcal conjugate vaccination. Pediatr Infect Dis J. 2012; 31(9): 951-5.