Several researchers at CVVR focus their work on the study of viruses that cause neurologic diseases, particularly JC and BK viruses. JC virus causes a devastating neurologic disease called progressive multifocal leukoencephalopathy (PML) that can arise in people who are immunocompromised, such as people with AIDS or patients treated with monoclonal antibodies to suppress the immune system. CVVR faculty are researching new methods to diagnose and treat these neurologic disorders, as well as to better understand the basic science behind the pathology of these neuro-viruses. Additional work is done at CVVR to investigate other pathogens that affect the central nervous system, such as tuberculosis.