I have two thoughts on this one.
One, the sample size is small and the individuals skew towards older people.
Two, there's no way that this persistence is found in someone who's 53, but not younger people as well.
It's a pretty worrying result that seems to insinuate that "getting over" COVID may simply be the passing of it from the respiratory system onto the cardiovascular system.
@BE fully agree. I wonder even if we ever get to eliminate the virus. Seeing mechanisms being slowly brought up, I seriously doubt it.