As overall pandemic worries continue to fade, one of the biggest curiosities continues to be log Covid, what causes it and who is the most susceptible?  A new study says that psychological factors such as depression, anxiety, and loneliness, could be better predictors than physical ailments.  To be clear, it is not a causal relationship, but there is an association.  Siwen Wang, research fellow at Harvard and lead author of this study, joins us for what to know.