This kind of N95 mask can actually spread the coronavirus - Los Angeles Times

Exhalation vents in masks can reduce moisture buildup but also potentially spread infectious droplets. But the fix is easy. Grab some tape.

COVID-19 and its variants:How N95 (hi-fi) masks can protect us

How switching to an N95 mask gives a 75x boost in COVID protection

A Visual Guide to Face Masks: What Works, What Doesn't

Face masks may return amid holiday 'tripledemic' of covid, flu and RSV - The Washington Post

Los Angeles urges some residents to wear masks at home

COVID-19 and its variants:How N95 (hi-fi) masks can protect us

An evidence review of face masks against COVID-19

Maintaining face mask use before and after achieving different COVID-19 vaccination coverage levels: a modelling study - The Lancet Public Health

N95 mask shortage: Why donations won't help every health care worker - Vox