Dr. Glenn Good, an epidemiologist at the University of California, San Francisco, was one of the first to study the effects of long COVID. Since 2021, he has been publishing, teaching, and researching this complex phenomenon, which persists in some patients long after the initial infection.

But three years later, he is no longer just a researcher, but also a patient.

For this expert, the illness has become an invisible prison: fewer precious hours per day, more room for surprises.