The challenge is when physical symptoms aren’t backed up by measurements of actual function. When people complain of lung or heart problems but all tests are n

The challenge is when physical symptoms aren’t backed up by measurements of actual function. When people complain of lung or heart problems but all tests are normal (oxygen levels, cardiac efficiency, lung capacity, exercise tolerance). When people claim cognitive decline yet all measures of cognitive ability are normal. It would point to a strong psychological component for at least some people - which was found in the study. Symptoms were correlated with those having a history of anxiety disorders (prior to Covid). There was also another study (I can’t find it right now) of self-reported long Covid suffers. They ran tests and many of them had never even been infected with Covid..ever. This isn’t to say that post-viral syndromes aren’t real. But it does suggest that self-reporting isn’t all that accurate.