Dan,
One of the MTT coaches tested positive the second week of August. She said she had the sniffles for a week. She sat her 2 weeks and started back up. She tired easily on the weekly runs for 3 more weeks before she was back to normal.
I didn't get the virus, but got an injury late March/early April. No exercise through April, May and June. Started back up when MTT started in July. The aerobic fitness is still not back to where it was before the injury. Not even close. Hang in there. It will come back.