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These Keychains Can Help You Avoid Touching Door Handles, Elevator Buttons, and So Much More

Viruses differ greatly in size, the smallest being about 20 nanometers in diameter to the largest measuring some 400 nanometers across. For reference, a human hair is about 60,000 nanometers in diameter, so literally billions of viruses could fit on that proverbial head of a pin. When it comes to things like elevator or ATM…