Keywords: Eastern equine encephalitis virus; Epstein–Barr virus; HTLV-1-associated myelopathy; JC virus; West Nile virus; cytomegalovirus; encephalitis; herpes simplex virus; human T lymphotropic virus type 1 (HTLV-1); human immunodeficiency virus; measles inclusion body encephalitis (MIBE); measles virus; meningitis; myelitis; pathology; poliovirus; progressive multifocal leukoencephalopathy; rabies; subacute sclerosing panencephalitis (SSPE); tropical spastic paraparesis; varicella-zoster virus.