Nope,
Long haul covid19 can be anyone that got Covid19 or that got the vaccine..
Some MD's the outcasts, LOL, have known for ages that a viral infection can cause a laundry list on chronic disease symptoms, and some are know/named as MS, RA, Lupus, CFS, AIDs and on and on...
They all fit in the category of compromised immune systems that display chronic inflammation that causes chronic fatigue and swelling, brain fog etc... as the Immune system battles a phantom(?) enemy and kills and damages healthy cells and organs over time that drains the body of energy and resources.....
All are issues Bucillamine can help fight if for no other reason than the regeneration of Glutathione for starters