Da_Hawks wroteCOLONAt my hospital, the KN95s weren`t even approved for medical use, so that shows how effective they even are.
KN95s never really even made known or recognized presence in North America until covid started. I've always ever known N95s only and until Matthew mentioned N99s, ive never really even seen 99s before ever, and I'm a frontline healthcare worker. Yea, KN95s aren't approved medical grade for airborne particle protection when it comes to north American hospital boards. N95s are the only airborne precaution approved masks in Canada I believe in hospitals.
KN95 just seems like one of those made to emulate N95s but is a softer fit that isn't as durable, but seemingly better than those regular cheapo dental masks. I have a few of them because my mom gave some to me where our relatives sent some our way from Korea. my impression is that KN95s are worn and readily more available in parts of east Asia because all of their certificates and authenticity seem Chinese. I hear that some hospitals there do approve these for use, but I don't trust it. either way everyone be careful. still in the 1900s in terms of positive test results in Ontario.