I think you mean there's a lack of broad consensus among scientists as to the root cause. There's scientific evidence aplenty. What constitutes as evidence of illness, if not ill people?
Sure, but I think for the bulk of reported long covid symptoms, there is a dispute over whether the cause is more related to post-virus sequelae or perceived infection by covid.
Long covid is likely a combination of both types, but there is evidence that a significant proportion is of the latter form.
Long covid is likely a combination of both types, but there is evidence that a significant proportion is of the latter form.