1. The nature of viruses -- 2. Cells and viruses -- 3. Specimen collection -- 4. Laboratory diagnosis -- 5. The respiratory tract -- 6. The gastrointestinal tract -- 7. The skin -- 8. The central nervous system -- 9. The eye -- 10. Pregnancy -- 11. Hepatitis -- 12. Transplantation -- 13. HIV and AIDS -- 14 Antiviral treatment -- 15. Oncogenic viruses