[gibba999]

>> Can you please propose a "randomized, longitudinal, controlled trials" one might conduct to figure that out?

> This is not a herculean problem. It's essentially the definition of any halfway decent medical study:

You're running in circles. That's not a randomized control trial. You'll get biases since the set of people infected with COVID19 isn't random.

This is not much better than existing studies. They're not preregistered, but that's the only upside of your methodology.

> There have been multiple RCTs conducted during the pandemic, despite the bureaucratic inertia of the academy, and "long covid" is one of the biggest remaining controversies. There's no universe in which you couldn't get funding and approval for such a study in short order.

IRBs are set up to prevent subject harm. An RCT, in this case, would involve randomly infecting people with COVID19 to eliminate the bias above. That will never fly.