It doesn't even say that! There's no no-mask control group to compare against. (And FYI not all medical masks are N95, probably most aren't. It appears that the

It doesn't even say that! There's no no-mask control group to compare against. (And FYI not all medical masks are N95, probably most aren't. It appears that the ones studied there are not N95 but rather the standard disposable surgical masks.)