While there is some difficulty nailing down a precise definition of Long Covid, “at least one clinically significant symptom that persists after recovery from the infection’s acute phase” covers the general idea, though it’s worth noting here that it’s not uncommon for Long Covid symptoms to start showing up many months later.
Given the extensive body of evidence documenting cumulative multi-systemic damage from reinfections, it is entirely unsurprising that Long Covid risk similarly compounds with repeated infections.
There is overwhelming consensus that the prevalence is at least 10% of infections. That’s not people — that’s a fresh spin of the cylinder per infection. And numerous studies suggest it may be as high as 30%.
There is a striking lack of correlation between severity of the acute-phase infection and likelihood of Long Covid, a non-negligible but underwhelming correlation with vaccination status, and a notable lack of consistent, objective, quantitative data indicating that recovery from Long Covid over time is any more likely than permanent chronic illness or even gradual deterioration.