1 Epidemiological Concepts and Methods -- 2 Surveillance and Seroepidemiology -- 3 Adenoviruses -- 4 Arboviruses -- 5 Arenaviruses -- 6 Coronaviruses -- 7 Cytomegalovirus -- 8 Enteroviruses -- 9 Epstein-Barr Virus -- 10 Viral Hepatitis -- 11 Epidemiology of Herpes Simplex Viruses 1 and 2 -- 12 Influenza Viruses -- 13 Measles -- 14 Mumps -- 15 The Parainfluenza Viruses -- 16 Rabies -- 17 Respiratory Syncytial Virus -- 18 Rhinoviruses -- 19 Rubella -- 20 Smallpox -- 21 Varicella-Herpes Zoster Virus -- 22 Epidemiology of Burkitt Lymphoma -- 23 Epidemiology of Cervical Cancer -- 24 Chronic Neurological Diseases: Subacute Sclerosing Panencephalitis, Progressive Multifocal Leukoencephalopathy, Kuru, Creutzfeldt-Jakob Disease -- 25 Nasopharyngeal Carcinoma