Anyone (aged 5+ in the UK) who has recovered from a Covid-19 test result during the last 7 to 180 days is likely to be eligible. However, each case will be evaluated by a doctor, who will be bound by professional norms to provide the certificate only if they believe it is safe and correct to do so. Please note that the certificate is only valid for 90 days in many countries following a positive test, and only 30 days in others, so please confirm with your destination before purchasing the certificate.