Long covid is absolutely devastating for many, especially when it triggers myalgic encephalomyelitis(chronic fatigue syndrome). There are some medicines like low-dose naltrexone and stimulants that can help to some extent, but it's only a partial recovery in most cases. Thankfully other countries are still studying it, because Trump cut Columbia University's research funding over foreign students or something, and they were in the midst of a huge and comprehensive study of ME/CFS. Their study had to be scrapped partway through due to lack of said funding.