Long covid is generally defined as >4 weeks. There are subdefinitions for different lengths. However, a lot of long covid may be a form a post-viral fatigue. Th

Long covid is generally defined as >4 weeks. There are subdefinitions for different lengths. However, a lot of long covid may be a form a post-viral fatigue. That doesn't discount it's importance, though. It's a lot more common than with a cold or flu. Anecdotally, for people I know, it would take six weeks to half a year to resolve.