Needles & Nations: How Travel Vaccines Became the New Passport to a Divided Planet
PARIS—A decade ago the only people who knew their titer from their Tdap were gap-year backpackers and epidemiologists with a sense of adventure. Today, the travel vaccine has become the hottest accessory since noise-canceling headphones and diplomatic immunity. From the marble corridors of the WHO in Geneva to the pop-up clinics wedged between duty-free liquor…