BOLOGNA, Italy—I am sitting in the middle of this northern Italian city, two hours’ drive from the Lombardian towns that have been quarantined. At this precise moment in time, Bologna has not produced a single instance of the new coronavirus. One or two people with the disease, known as COVID-19, have been moved into the hospital here from other regions, but nobody around me, or anywhere near me, is ill. Yet at the American university where I am a guest lecturer, we speak of little else.

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