ST. JUDE CHILDREN’S RESEARCH HOSPITAL IMAGE: From left: Hongbo Chi, Ph.D., Hongling Huang, Ph.D., and PeiPei Zhou, Ph.D., all of St. Jude Immunology, have mapped the previously unknown biological machinery by which the immune system generates T cells that kill bacteria, viruses and tumor cells. CREDIT: ST. JUDE CHILDREN’S RESEARCH HOSPITAL Immunologists at St. Jude Children’s Research Hospital have mapped the...