I am armed and ready with sources as part of the game, and the statement on epistemology hardly needs qualification.
https://www.covid.gov/be-informed/longcovid/about#term
Any pain or psychological issue you have after covid can be categorized as "Long Covid". Which is ridiculous because if covid never happened we wouldn't expect joint pain and depression to go away. Those things existed long before covid and should have been expected to exist after covid.
Non reproduced studies that cherry pick data to fit the conclusion do not refute these facts.
The name implies that there is a known cause, and the diagnosis IS Long Covid.
Long COVID is similar in that they have identified risk factors like age or not being vaccinated and have some theories for the underlying mechanism and biomarkers which hopefully will make it easier for clinicians to identify patients or warn people with high risk factors.
"We conclude that despite widespread use of narcotic drugs in hospitals, the development of addiction is rare in medical patients with no history of addiction. "https://www.nejm.org/doi/10.1056/NEJM198001103020221 "Our analyses clearly show that SARS-CoV-2 is not a laboratory construct or a purposefully manipulated virus." https://www.nature.com/articles/s41591-020-0820-9