Recruitment and participant eligibility
infection
INFECTION, RECRUITMENT
The main setting for this study was UK primary care. Nineteen general practices were recruited after email invitation for expressions of interest, following the sharing of Research Information Sheets for GP surgeries to practices identified through the Oxford-Royal College of General Practitioners (RCGP) Research and Surveillance Centre (RSC) and the National Institute for Health and Care Research (NIHR) Clinical Research Network (CRN). To increase recruitment, two COVID-19 community testing centres for symptomatic individuals were added as additional recruitment sites in the spring of 2021. Participants were adults and children presenting with symptoms of active infection consistent with suspected current COVID-19 (see [