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School health and safety programs and hygiene classes teach children the proper way to cover their mouths and noses when they cough or sneeze. Covering both is important to prevent the spread of germs.

When coughing, although most of the respiratory droplets that can spread viruses and diseases would come from their mouths, there is also a certain amount that can come out of their noses at the same time (as with a sneeze) due to the force behind coughs. Covering both the nose and mouth during coughs or sneezes is the proper way to prevent that spread of disease. It is also the proper way for good manners, so you don't spit in someone's face (or worse if it is coming from your nose!).

It is best to use a tissue to cover both, but since tissues aren't always available when needed, children and adults are taught to cover their mouths and noses with their arm (or crook of arm at the elbow) to prevent the respiratory droplets from being released. Practice good health and safety and good etiquette by covering yours, too.

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