Actually, a recent meta-analysis found that when you actually add a control group, most of the "long COVID" symptoms disappear. Higher quality studies were was associated with lower prevalence of almost all symptoms. "Long COVID" appears to be almost entirely an artifact of bad science (and bad science reporting)
See https://twitter.com/ShamezLadhani/status/1472622893154639876 and https://www.journalofinfection.com/article/S0163-4453(21)005...