The expert cited is Stephen Hatfill, not Stephen Hatfield. Dr. Hatfill is a qualified virologist. Thanks for playing though.
Another doctor who is saying this is Richard M Fleming, PhD, MD, JD.
His website has a 2.5 hour “master class” on SARS-CoV-2 & COVID-19 that every person in America should watch.
https://www.flemingmethod.com/
I've seen lots of oddities in Covid patients and after vaccinations for Covid. There is no definitive explanation for many of these things - just supposition/extrapolation.
Yes, there are experts on Coronavirus, but this does not qualify as expertise on the effects and pathophysiology of human infection with Covid.