[sdenton4]

There are two studies linked directly from the Harvard health article, one tracking Italian outpatients, and the other using randomized phone follow-up. Feel free to go read them, and more besides.

There's a constellation of individually imperfect studies pointing in the exact same direction; that's basically how science happens. The studies exist in the first place because people observed Something Strange was happening, and wanted to quickly get a sense of severity and prevalence, to inform public health response.

And if you're not willing to update your priors, I'll be here waiting for the perfect study that proves long covid doesn't exist...