Hongbo Chi team (IMAGE) St. Jude Children's Research Hospital Caption 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 Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.