COVID is definitely not the only case where acute form might shift into a chronic one. For a recent overview see, e.g., Unexplained post-acute infection syndr

COVID is definitely not the only case where acute form might shift into a chronic one. For a recent overview see, e.g., Unexplained post-acute infection syndromes[0]. > As of now, the true extent of PAISs remains uncertain, as there is a significant risk that a lot of cases, especially under sporadic circumstances, remain unrecognized. > The research that is available concentrates on PAISs in the context of either well-monitored acute infectious diseases, or as a follow-up of outbreaks and epidemics. [0] https://www.nature.com/articles/s41591-022-01810-6 https://www.nature.com/articles/s41591-022-01810-6