Come sit on the London underground and watch all the mask-wearers adjusting their masks with the same hands that touch the doors and the seats, incidentally tou

Come sit on the London underground and watch all the mask-wearers adjusting their masks with the same hands that touch the doors and the seats, incidentally touching their faces. Is that safer? Maybe, maybe not. We could do with some numbers on this but where are they? We've had masks since the herb-filled beaks of the plagues of the middle-ages, where are the numbers?