Germaphobes, maybe you're on to something.
Sickness-causing bacteria and viruses can lurk on surfaces long after they're expelled in an infected person's sneeze or snot. Some can even stay on a surface for months, given the right conditions. While the ability of these microorganisms to actually make you sick depends on a number of factors (bacterial/viral load, your immune system, conditions for survivability), don't mind us if we play it safe and up the disinfecting and hand-washing.
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