I was expecting the linked study to support your hypothesis that fear of covid-19 causes long-covid, but unfortunately it was just a writeup of 1 person's opinion of something that might have happened nearly a century ago, with literally 0 experimental methodology (because it appears to be an op-ed rather than an experiment?)

Your hypothesis doesn't seem super likely, though I'd entertain the theory if there were a study showing a linkage here. But as for your literal question, I don't think anyone supposes you specifically must do anything. After all, what's 1 person out of billions?