00495nas a2200193   4500000000100000000000100001008004100002100002100043700001600064700001500080700001100095700001400106700001400120700001500134245011700149300001400266490000700280022001400287       2016                            d1 aG. Amirthalingam1 aH. Campbell1 aS. Ribeiro1 aN. Fry1 aM. Ramsay1 aE. Miller1 aN. Andrews00aSustained Effectiveness of the Maternal Pertussis Immunization Program in England 3 Years Following Introduction  aS236-s2430 v63  a1058-4838