1. Airborne nosocomial infections -- 2. Airborne nosocomial epidemiology -- 3. Hospital aerobiology -- 4. Airborne nosocomial microorganisms -- 5. Airborne nosocomial etiology -- 6. Hospital facilities -- 7. Ventilation and diffusion -- 8. Air filtration -- 9. Hospital disinfection -- 10. Hand hygiene -- 11. Respiratory infections -- 12. Surgical site infections -- 13. ICUs and patient room -- 14. Pediatric nosocomial infections -- 15. Immunocompromised and burn wound infections -- 16. Nursing homes -- 17. Procedural controls and guidelines -- 18. Air and surface sampling -- 19. UVGI air disinfection -- 20. UVGI surface disinfection -- 21. Alternative air cleaning technologies.