So officially after a positive Covid19 swab test, they shouldn't be testing you for another 90 days. So why do they test people 3 times a week in care homes and hospitals? Paragraph 6 of offical government literature https://www.gov.uk/government/publications/covid-19-management-of-exposed-healthcare-workers-and-patients-in-hospital-settings/covid-19-management-of-exposed-healthcare-workers-and-patients-in-hospital-settings