It wasn’t the first time she’d had yeast. Yeast was common. The pollution from overuse of broad-scale antibiotics had made Candida fiercer and scarier, the same way it had supercharged staph and flu and TB and all the rest. Candida hadn’t bootstrapped its way up to the utter lethality of, say, Bengali cholera, but it had gotten a lot more contagious, and nowadays it actually was a genital infection that you could catch off a toilet seat.