I sense that we may me talking past one another. You seem to be focusing on my word choice and and justifying that we should spend resources studying COVID-19.

I sense that we may me talking past one another. You seem to be focusing on my word choice and and justifying that we should spend resources studying COVID-19. My post does not dispute this at all. What I'm saying is that to conclude that effect X (demyelination) is a cause for additional concern with respect to disease A (COVID-19), we should go back and see whether effect X is also present with respect to other diseases such as B, C, D (common cold, flu, etc). Because we may have found X linked to A because we are looking so hard at A, and not have found it previously with respect to B, C, D because we weren't looking as hard then.