We all want a carefree vacation where we can eat and drink anything we fancy. And you can do just that in many cities and countries, whether you’re snacking in a café in Paris or Pisa or dining in an elegant restaurant in Tel Aviv or Tokyo. But when you travel to far-flung, developing locales—India, Pakistan, Sub-Saharan Africa, Egypt, Guatemala, and Brazil, to name a few—you must be extra vigilant to prevent becoming ill from food- or water-borne germs. These tips can help you avoid “traveler’s tummy” when traveling in the developing world or other places where sanitation or water systems are less than optimal.