It sort of says itself: if you put a filter in the stream of air entering your mouth and nose, you get fewer “things” entering your respiratory system. And respirators are very good at catching viruses.
Tag: n95
It is kind of obvious that mask should make a difference. especially if we are talking respirator masks (N95/Ffp2/Kn95 etc) that are designed to protect the bearer from patogens like viruses. What we have sort of lacked is a real world comparison between a larger number of schools that keeps mask requirements and schools that remove mask requirements. And the result is clear: it makes a big difference. The first link is to the Time article about the NEJM published study.
https://time.com/6231516/universal-masking-in-school-works-new-data-shows-how-well/
https://www.nejm.org/doi/full/10.1056/NEJMoa2211029?query=featured_home
This article explains the wonders (or rather science) that make N95/Ffp2 masks do their job so well.
https://www.wired.com/story/the-physics-of-the-n95-face-mask/
Anyone read up on Covid and transmission/mitigation. knows that the SARS-Cov-2 virus likes to get airborne. 90%+ of transmission is airborne. This makes air quality important when it comes to protect people indoors.
https://www.scientificamerican.com/video/how-to-improve-indoor-air-quality/