<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Verdana, sans-serif;"><div>I have heard it said in the name of Rav Ahron Soloveichik (<i>Logic of the Heart</i>) that some of what Chazal tell us about sheidim might refer to (or apply to) microbes. Such as: they’re everywhere, there are far more of them than us, they are invisible for good reason (you wouldn’t want to see them), some are harmful while others are helpful. And that there are other kinds of forces in the world, also called sheidim, that cause dementia etc. I’m looking any further sources. Thanks.</div></body></html>