More than 1,000 young people packed McCaw Hall June 17 to party with a purpose. They raised more than $35,000 for the Infectious Disease Research Institute, which has developed rapid TB tests for use in Haiti. UW showcased the work of global health researcher Tom Hawn, MD, PhD, and fellow researchers at UW who are studying the macrophage (the cells where TB invades and lives in) and the phagosome (a special compartment in the macrophage designed to kill things) to determine why some people are immune to TB and others are not.