1. UK scales back routine covid-19 surveillance
2. Office for National Statistics. Coronavirus (covid-19) infection survey, UK statistical bulletins. https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/conditionsanddiseases/bulletins/coronaviruscovid19infectionsurveypilot/previousReleases.
3. Variant-specific symptoms of COVID-19 in a study of 1,542,510 adults in England
4. Zoe Health Study. ZOE’s covid Study awarded extra funds to continue critical work. Jun, 2021. https://health-study.joinzoe.com/post/covid-study-extra-funds.
5. Get a PCR test to check if you have coronavirus (covid-19). Gov.UK. https://www.gov.uk/get-coronavirus-test.