00514nas a2200217   4500000000100000000000100001008004100002100002100043700001500064700001600079700001500095700001200110700001500122700001100137700001400148700001400162245008700176300001100263490000800274022001400282       2014                            d1 aG. Amirthalingam1 aN. Andrews1 aH. Campbell1 aS. Ribeiro1 aE. Kara1 aK. Donegan1 aN. Fry1 aE. Miller1 aM. Ramsay00aEffectiveness of maternal pertussis vaccination in England: an observational study  a1521-80 v384  a0140-6736