HEPA masks are provided to prevent which illnesses?

• A. Influenza
• B. Tuberculosis
• C. Airborne allergies
• D. Tuberculosis and other airborne diseases

Answer: (D)

HEPA filtration blocks the inhalation of very small airborne particles, including aerosols that can carry infectious agents. Tuberculosis spreads through tiny airborne droplets containing the bacteria, so a properly fitted HEPA respirator can significantly reduce the chance of inhaling those particles. The same principle applies to other diseases that travel in the air as aerosols, making protection against TB and other airborne diseases a primary reason for providing HEPA masks.

Influenza mainly spreads through larger droplets and close contact, so while a respirator can offer protection, it’s not the primary route these masks target. Airborne allergies involve non-infectious allergens like pollen, which are not illnesses caused by pathogens, so they’re not the best match for the protective purpose in this context.