School Attendance Registers for the Syndromic Surveillance of Infectious Intestinal Disease in UK Children: Protocol for a Retrospective Analysis

Anna L Donaldson   ^{1, 2, 3} , MBBCHIR ;   John P Harris   ^{1, 2} , PhD ;   Roberto Vivancos   ^{1, 3} , LMS, MD ;   Daniel Hungerford   ^{1, 3, 4} , PhD ;   Ian Hall   ^{1, 5} , PhD ;   Sarah J O'Brien   ^{1, 2} , MBBS

¹ NIHR Health Protection Research Unit in Gastrointestinal Infections, University of Liverpool, Liverpool, United Kingdom

² Institute of Population Health, University of Liverpool, Liverpool, United Kingdom

³ Field Epidemiology Service, Public Health England, Liverpool, United Kingdom

⁴ Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom

⁵ Department of Mathematics and School of Health Sciences, University of Manchester, Manchester, United Kingdom