With 48.5 million cases in America conservatively around 10% to 20% will experience ongoing Long COVID while the subset of total cases that involve critical illness leads to a significant probability of death and/or new material symptoms.
One more fake information of Trial site. Long Covid is rare- below 1% and only affects people treated in hospital or with symptom duration > 15 days. Long CoV among kids does not even exist as the only serious study done so far shows.
There are always long lasting symptoms after a severe illness. These symptoms stem from the affected body parts, mostly lungs, nerves. This is the price people pay for no treatment given. Some people cannot clear the virus and need e.g. Ivermectin, some with vegetative disorder need a mast cell therapy.
So serious people expect less than 1% long Covid. But some studies start to count in social disorder caused by lock downs vaccine damage etc.. as Long CoV... a clever way to hide vaccine damage and political action induced damage.