I said "heart and lungs," I believe. If I did not say heart and lungs, I apologize, but it was specifically the heart damage that constitutes the lingering problem.
The 80% is an estimate (due to the fact that asymptomatic populations often do not present for treatment, so of course that has to be taken into account).
In longterm studies in Wuhan (a place that has enough cases and enough longitude for this kind of thing), 77% of patients still had mild to severe lung pathologies after 3 months. 17% had abnormal heart rhythms not detected before CoVid. Not everyone had both - so about 80%).
Keep in mind that Wuhan tested its entire population, so the data include all ages. So far, not many studies on the correlation between mild cases and mild pathologies - but the null hypothesis (common sense) would say that milder or asymptomatic cases have fewer pathologies, and so far, each dip into the data seems to show that's true (so children have the mildest symptoms).
Still, those who watch this science think there's cause for alarm (please don't respond to me about whether or not you think China has good data - I've posted several times about why scientists think China has good data, you don't have to accept it, but I am giving you my professional opinion on this).
Data from Italy says similar.
Other things that may occur to asymptomatic or younger people that are of concern to medical researchers include new onset of diabetes, erasure of bone marrow immunity (T cells), and in several concerning new studies: stillbirths. It's too soon to say that the virus itself caused the stillbirths (naturally, not all of the mothers were tested for CoVid - the data is international). One hypothesis is that CoVid is doing something to the placent (it's a vascular/epithelial disease, after all, not a respiratory one) but another hypothesis is that mothers are not going to the doctor either out of fear or because medical systems are strained.
Milder cases cause less damage, it's clear - but still can have damage. We'd know more if we could study many more people, because those with few symptoms aren't going for testing - or lung pictures - in most cases. Certainly, in the US, no one is getting a lung x-ray just because they tested positive for CoVid. If they have mild to moderate symptoms, they'll be sent home. If their moderate symptoms get worse, unless their symptoms are severe, they will be sent home to self-quarantine and use mostly OTC meds for treatment (1 in 10 will end up hospitalized eventually, of that group).
But the question is, shouldn't the public have all the various data in front of them before they send their kids to school? And even if children aren't involved, we should all know that the risks are very much under study - and rather concerning.
