There was a very large study done in Scotland for Long Covid infections, and it appears that is far more complicated and lengthy as the original infection.
"The Scottish study found that between six and 18 months after infection, 1 in 20 people had not recovered and 42 percent reported partial recovery. There were some reassuring aspects to the results: People with asymptomatic infections are unlikely to suffer long-term effects, and vaccination appears to offer some protection from long covid.'
https://wapo.st/3EzxGzu
Gifted article, free to read