I'm skimming through that sciencemag article, and I just don't see anything about long-term effects. It looks like it's all symptoms that people have developed in the short term. I mean, they are bad symptoms, obviously, but I'm not seeing anything comparable to the chickenpox/shingles connection. (One reason I'm skeptical here is how could they even know if it leads to long-term problems, since the virus only began infecting people a few months ago. )