This preprint, combined with a recently published study on measurable heart damage [1] makes it clear how little we still know about the long term effects of COVID-19. Similar to this pre-print, [1], looked at both hospitalized and non-hospitalized patients (patients with minor/no symptoms who recovered at home), and found potential long term effects.
[1] https://jamanetwork.com/journals/jamacardiology/fullarticle/...
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