General advice: https://www.nhs.uk/conditions/coronavirus-covid-19/
Coronavirus symptoms: https://www.nhs.uk/conditions/coronavirus-covid-19/check-if-you-have-coronavirus-symptoms/
Get an isolation note: https://111.nhs.uk/isolation-note/
People at higher risk from coronavirus: https://www.nhs.uk/conditions/coronavirus-covid-19/people-at-higher-risk-from-coronavirus/
Advice on post-viral fatigue:
Post COVID-19 recovery: