Additional control measures and exemptions
The CNESST provides several tools to support workplaces during COVID-19. The proposed measures are based on the principle of a hierarchy of controls.
There are a number of situations where wearing a medical mask at all times requires adjustments to be made to the health measures, namely, when the mask interferes with communication, understanding or learning. The cases below are classified by category of staff and describe situations where a medical mask does not have to be worn at all times. This information is provided as a complement to the publication Control measures in the workplace in the context of the appearance of variants under increased surveillance.