The dermatropic and viscerotropic viruses. Smallpox, cowpox, and vaccination; measles, rubella, chicken pox and shingles, Herpes Viruses Yellow fever; lassa fever, Hep A and B influenza, arbo viruses. The neurotropic viruses (rabies, poliomyelitis, encephalitis, Lynphocytic Choriomeningitis viruses, mumps, viral transformation and types of tumors and viruses. Oncogene theory etc. viral gastroenteritis; miscellaneous viruses, vaccines and production/immunization.