This rapid test can be used to confirm that you have had COVID-19. It can indicate if you are still in the acute phase of infection and are therefore still infectious, or if you have fully recovered and no longer need to self-isolate.
Since PCR tests performed within three months of recovery can produce false positive results, a positive COVID-19 antibody result is used by some airlines/countries for travel purposes. Collecting blood from a finger prick, this test takes 15 minutes.