PML is a rare viral disease that can affect people with weakened immune systems, developing more often in AIDS patients. Dr. Joseph R. Berger, Chairman and Professor for the Department of Neurology at the UKMC, has helped publish many works on such neurological disorders and explains some of the research.  He covers several topics including: understanding pathobiology; recognizing clinical manifestations; and exploring immunological perturbations. From the Series:Dean’s Distinguished Lecture Series