To receive a Letter Of Recovery, you must have had: At least one positive Rapid Antigen or RT-PCR Test for COVID-19. (not applicable for at-home tests) You must have also isolated the appropriate length of time per your vaccination status: 5 days if vaccinated 2 doses, or 2 doses plus a booster; 10 days if unvaccinated. You must be improving 24 hrs before ending the isolation; If at day 5 symptoms appear they must be non-symptomatic for 10 days before you can retest.