Cover mouth when cough or sneeze.
Meaning: This means to use your hand or a tissue to cover your mouth when you cough or sneeze to prevent the spread of germs.
Choice of Words: Cover means to put something over something else in order to protect it. Mouth is the opening in the face through which you speak and eat. When means at the time that something happens. Cough is a sudden, noisy expulsion of air from the lungs, typically caused by irritation or illness. Sneeze is a sudden, involuntary expulsion of air from the nose and mouth, typically caused by irritation or illness.
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