Which type of precaution requires the use of an N95 mask?

The use of an N95 mask is specifically associated with airborne precautions. This type of precaution is necessary for infections that can be transmitted through tiny respiratory droplets, which remain suspended in the air for prolonged periods and can be inhaled into the lungs of individuals who are not infected. Conditions that typically require airborne precautions include tuberculosis, measles, and varicella (chickenpox).

Airborne precautions aim to prevent the spread of these infections in settings where individuals may be exposed. An N95 mask is designed to filter out at least 95% of airborne particles, providing a higher level of protection than standard surgical masks. This level of protection is essential due to the nature of the pathogens involved, which can be very infectious even at low exposure levels. Therefore, the use of an N95 mask is a critical component of airborne precautions.