Masks only work if your breath goes through them: in and out. That means minimal air leakage around the side. They must fit close to the face, so you may need to adjust the ear or head loops.

For the same reason, instructors will also not require a mask in class. However, those who are more comfortable wearing a mask may choose to do so. And labs? Wearing of medical-grade masks may be ...

Demands from teachers for increased safety measures like stronger mask rules have grown louder since COVID-19 variants were identified at several schools on the Lower Mainland ...

“When you look at a mask on a microscopic level, you can see the mask has a net-like type of structure that allows it to trap particles - in the centre of the mask, that is where it's doing its ...

The Question I work at a distribution centre which happens to be in a COVID-19 hotspot. There are mask protocols but management doesn’t enforce them.