Well, the haze is back. And in full force. But does that mean you need to reach for an N95 mask whenever you head outdoors?

A study of more than 1,000 health care workers was unable to establish whether medical masks are significantly less effective at preventing COVID-19 infection than N95 respirators in hospital settings ...

N95 masks can cut the fine dust you breathe on smoggy days, but only when they fit snugly. Here's what they block, what they ...

Sunnybrook Health Sciences Centre says it is taking snorkel masks initially meant for use underwater, and adding a filter meant to catch hazardous particles TORONTO — Limited supplies of N95 masks ...

A shortage of N95 masks in 2020 led the CDC to craft guidelines for healthcare workers who needed to reuse them for multiple shifts, but a new study, published Jan. 26 in JAMA, has found reuse of ...

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