Interview: David Fajgenbaum. Dr. David Fajgenbaum has undergone an extraordinary medical experience. During medical school, he had his last rites read in 2010 and nearly died four more times as he battled a rare and incurable illness. Thanks to a drug that he discovered in his lab—and began testing on himself—he’s now in his longest longest remission ever (5.5 years). He leads the effort to cure his disease—idiopathic multicentric Castleman disease—as a physician-scientist at Penn and co-founder of the Castleman…