www.thelancet.com/journals/lan...
www.thelancet.com/journals/lan...
however year to year variability in LRTI/bronchiolitis attendances/admissions, and differences in coding between sites, might make the impact of maternal vaccination harder to gage
however year to year variability in LRTI/bronchiolitis attendances/admissions, and differences in coding between sites, might make the impact of maternal vaccination harder to gage