Anxiety is generally correlated with systemic markers of inflammation though, so there could be some hidden variables there. Perhaps having an overly sensitive

Anxiety is generally correlated with systemic markers of inflammation though, so there could be some hidden variables there. Perhaps having an overly sensitive immune system predisposes one to both anxiety and long Covid, or perhaps the physical effects of anxiety on the body predispose people to maladaptive immune responses to Covid, or etc. etc.