This is the first of a series of reports on NDM-1 bacteria, bugs endowed with the ability to resist not only commonly used antibiotics but the last-resort IV antibiotics used only in hospitals. NDM-1 first emerged in New Delhi (and is, controversially, named after the city) and has since spread to over 35 countries, primarily in the bodies of medical tourists. I recently returned from a trip to New Delhi, and filed this report for The Atlantic and the Pulitizer Center on Crisis Reporting, which funded my trip. Photos, video, an audio slideshow, and more stories in Foreign Affairs and Le Monde Diplomatique are forthcoming. Stay tuned.