A patient with advanced pulmonary TB in a tuberculosis hospital in Mumbai, India receives a daily injection as well as oxygen. Photojournalist James Nachtwey brought us (through photography) a story this year of a new, dangerous type of tuberculosis called Extreme Drug-Resistant Tuberculosis, or XDR-TB. Tuberculosis is both preventable and curable, but inadequate treatment has been driving the emergence of XDR-TB, especially in developing nations. For more information about XDR-TB, please visit xdrtb.org.