With all those scary microbes out there, it's hard to get worked up over a toenail fungus or a case of athlete's foot. But the fungi that cause these and dozens of other infections are not as trivial as they may seem. Fungi have a way of turning nasty--seeping into the bloodstream and invading vital organs. Lately they've been doing that more and more, thanks to increased travel (which exposes people to fungi for which they have no immunity) and to immunosuppressant drugs (which leave patients vulnerable to what would otherwise be innocuous fungal infections). "The kind of thing that used...
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