Well I hope everyone is getting vaccinated if you aren't wear a mask, and wear a good one and make sure it fits well. Here is a slide from a recent mask testing paper using a new technology to visualize penetration through mask-or leakage. A pic is worth a thousand words. The N95 and surgical mask block penetration but still some leakage-especially surgical mask. The thee layered mask did lower penetration but still passage and lots of turbulent leakage around face, the other masks had significant penetration. This paper followed the "one paper" stating the effectiveness of a three layered mask so it appear to partially falsify that data. I trust an N95 and wearing it properly.