| I fail to understand this. >The most simple face mask (not a gas mask) does not protect you from environment, it protects other people from you. >Moreso a mask can be a cause for reinfection with virus, since you are breathing back in what you exhale. >Hoarding prevention is also a very important task in the midst of a crisis. Hence WHO recommendation is justified. These three sentences can be boiled down to: - WHO's recommendation is justified to prevent the hoarding of that item because: If you're sick, wearing it will harm you and protect others. If you're not, it's useless to you. Therefore, only sick people wanting to remain sick should wear them. That excludes physicians who may not be sick, and do not wish to remain sick if they already are. Furthermore, is the protective property on the simple face masks anisotropic? How does it protect in a way and not in the other? Does a mask of non null thickness and non null fabric count protect less than no material? Will it prevent absolutely no harmful particle from getting to me? Sick++|| Healthy (works when sick wears it)
Sick+ +||Healthy (fails when healty wears it)
Do I understand this correctly? |
When a healthy person inhales wearing a mask big part of the air comes from the side, because it's an easier route and because fluid dynamics. Then healthy person touches their eyes with unwashed hands and still gets infected.
Official recommendation for sick people as far as I am aware is to change the mask every couple of hours, because by then enough fluid accumulates on the mask to pose threat.
"it's useless to you" - it's a freaking pandemic - nothing is about you, the fight is to stop exponential growth of the infected.