Touching a surface with a finger will transfer on average half the contamination over a finger tip. Or a palm. Touching that to your nose is half that or 1/4.
Now touch the surface with the tiny key tip. If it's 100 times as small that would be not 100 less but 10, 000 times less dosage. For a palm on a door handle it could be millions less.
Ferdzee t1_irkmy6y wrote
Reply to comment by [deleted] in What is the current consensus on coronavirus transmission through fomites? Can I stop pressing elevator buttons with my keys? by PolytheneMan
Touching a surface with a finger will transfer on average half the contamination over a finger tip. Or a palm. Touching that to your nose is half that or 1/4.
Now touch the surface with the tiny key tip. If it's 100 times as small that would be not 100 less but 10, 000 times less dosage. For a palm on a door handle it could be millions less.