I guess every mask has 'limited protection'. N95 is 95%. The limit being 95%. The masks most people are wearing are 'surgical masks' but those still tend to be

I guess every mask has 'limited protection'. N95 is 95%. The limit being 95%. The masks most people are wearing are 'surgical masks' but those still tend to be in the 75% range. Which if both sides are wearing 75% masks, then the effectiveness is still relatively high. An effectiveness above 90%. The article says: “The results could indicate a more moderate degree of protection of 15-20%, however, the study could not rule out that face masks do not provide any protection.” That's just not in line with what we do know. Mask technology isn't new. This seems overly broad as well, how did they account for say hand washing? Everyone had the same hand washing regime? I doubt they controlled for that. Here's the thing, if you don't trust in the level of masks. You are completely free to do better. This isn't an argument to go backwards in protection.