The Center for Neuroanatomy with Neurotropic Viruses (CNNV) is a national resource that serves investigators who are interested in using viral transneuronal tracing to study the functional organization of the nervous system. The Center provides high-titer, well-characterized strains of pseudorabies virus, herpes simplex virus and rabies virus for circuit analysis. Based at Pitt, the CNNV also has vital cores at Princeton University and Thomas Jefferson University. Learn more.