Weekly rate (per 1 000 000), by age group, of all-cause acute gastroenteritis–associated hospital admissions in England and Wales, July 2007 through June 2014. Solid gray lines represent the mean weekly rate for the prevaccination era. Dashed gray lines represent the maximum and minimum weekly rate for the prevaccination era. Solid black lines represent the weekly rate for the postvaccination rotavirus season (July 2013 through June 2014).