If your fingers have viruses on them and then you touch your eyes, nose or mouth you are likely to infect yourself. Our eyes have tear drains that flow into the nose and so can pass germs down into it.
This is why it is good to wash your hands as often as possible as you may touch your face at any time without noticing.
Washing your hands is one of the best ways to stop the spread of illnesses. This is why it is the main way used to fight infections in hospitals.
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