Intuitively, it seems that if it reduced symptoms after infection, than it would have been seen as correlated to exhalation. Now, I realize that it could just

Intuitively, it seems that if it reduced symptoms after infection, than it would have been seen as correlated to exhalation. Now, I realize that it could just negatively correlate with self-reporting symptoms? Or it could be that that correlation between self reporting and how much you exhaled was just very lightly correlated, such that the other correlation is low? Neither of which would be that surprising, I guess. They do disappoint me, for some reason.