Infection Control · single question
Which of the following diseases is transmitted by the AIRBORNE route EXCEPT:
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Correct answer: C. Hepatitis B virus (HBV)
- A. Measles (rubeola) is a highly contagious airborne pathogen transmitted via aerosolized respiratory droplets.
- B. Tuberculosis spreads via airborne droplet nuclei (<5 μm) that can remain suspended in air for hours — a true airborne pathogen.
- C. Hepatitis B (HBV) is transmitted via BLOODBORNE routes — contact with infected blood, sexual contact, or perinatal transmission. It is NOT airborne. ✓
- D. Varicella-zoster (chickenpox) spreads via both airborne route (aerosolized vesicle fluid) and direct contact — classified as airborne.
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