Ran a marathon this weekend six weeks after the first appearance of symptoms (fever). I had missed only a few days of running and resumed speed work at ten days, but was weakened by fighting the virus. Feeling pretty good by five weeks, but still not 100%, still having some airways irritation, and not sure what to expect on race day.
Result: about ten minutes slow, and second in the age group by a good deal less than that. So I was able to run OK, but not great. Mainly I am grateful and relieved that COVID hasn't ruined me. I feel like I will get back to 100% very soon. I hope other Letsrunners have similar or better experiences with the virus.