[jjgreen]

I've heard this a couple of times, it's a bit trite, a little anti-science, but worth some analysis. Suppose your analogy holds: which of mask-wearing and non-wearing is the parachute and which is the empty backpack? I ride the London underground regularly, masks are mandatory and 90-95% of people wear one. I'd say 20% of people let it drift down from their nose while they play on their phones, more than that are constantly adjusting it, touching their face with the hands that are also touching the seats and the hand-rails. Is this more or less dangerous than not wearing one at all? Are we really saying that this question is outside the realm of science?