Nice study.
But it didn't show where these people were from looks like hospital inpatients in the first Wuhan cluster.
Also I would like to see their results compared to non covid positive of the same age.
A member of my family got swine flu in 2009/10 they had very adverse health affects for three years after. So its not uncommon to have long term affects from flu like illnesses
https://www.thelancet.com/journals/lancet/article/PIIS0140-6...