Certification in Infection Prevention and Control (CIC) Practice Exam 2025 - Free CIC Practice Questions and Study Guide

A mask or respiratory protection device is required for Varicella (chickenpox) due to its highly infectious nature and the mode of transmission. Varicella is spread through direct contact with the rash, respiratory droplets from a cough or sneeze, and possibly aerosols generated from the infected person's skin lesions. The use of masks helps to prevent the inhalation of these infectious droplets, thus reducing the risk of transmission, especially in healthcare settings or during outbreaks.

In contrast, while Flu can also be transmitted through respiratory droplets, standard precautions typically suffice. Diphtheria requires droplet precautions, but it is primarily transmitted via respiratory droplets when a person is in close proximity, thus masks are more of a supplemental protection rather than an absolute requirement in all cases. Mumps is primarily transmitted through respiratory droplets as well, and while masks may be used, they are not mandated as in the case of Varicella. Therefore, the requirement for a mask or respiratory protection is most stringent and necessary for Varicella, highlighting the importance of respiratory protection in controlling the spread of this specific infectious disease.