Prolonged viral shedding is what happens when parts of a virus are detectable in a person for a period of time even after they’ve recovered from an illness. For some individuals who had or have COVID-19, the virus may be in their test samples for up to 3 months. Retesting during this time period is not recommended. However, if an individual starts having symptoms consistent with COVID-19 during this period and other illnesses are ruled out, a healthcare provider or infectious disease expert may consider additional testing. The best available evidence suggests that most individuals who have recovered are likely no longer infectious, but there is not enough evidence at this time to confirm this. If you have questions, contact your healthcare provider for additional information.