Your question has more to do with the theory of contagion than the theory of viruses. I do not deny that some evidence exists for contagion, although what contagion actually is has never once been proven. Contagion by itself is not evidence for anything at all, other than that illness may sometimes (though certainly not necessarily) have a common origin. Though what such an origin is has never been convincingly demonstrated . . . not even once. So it's anybody's guess what it might be. Women living together synchronize their menstrual cycle, but we don't jump to the conclusion that some particle jumped from one to the other. When someone nearby yawns or laughs, we start to as well, but we haven't "caught" anything material.

Your question has more to do with the theory of contagion than the theory of viruses. I do not deny that some evidence exists for contagion, although what contagion actually is has never once been proven. Contagion by itself is not evidence for anything at all other than that illness is not always a strictly individualized phenomenon (though it often is).

Your question has more to do with the theory of contagion than the theory of viruses. I do not deny that some evidence exists for contagion, although what contagion actually is has never once been proven. Contagion is not evidence for anything at all other than that illness is not always a strictly individualized phenomenon (though it often is).

Your question has more to do with the theory of contagion than the theory of viruses. I do not deny that some evidence exists for contagion, although what contagion actually is has never once been proven. Contagion is not evidence for anything else other than that illness is not always a strictly individualized phenomenon (though it often is).