Drug-resistant TB in India: Photographs by James Nachtwey

India’s urgent battle against tuberculosis is almost invisible, until you start to look for it. Then you will find it everywhere: in the hospital down the street, in the corner pharmacy, in labs, offices, and schools. With some two million new cases each year, India has more TB patients than any other single country. The government is fighting this ancient, airborne bacteria in both small, far-flung villages and the some of the biggest cities in the world.