Common Cold Health Video

A cold is an infection in the upper respiratory tract. Colds are caused by viruses. People spread the virus through sneezing, coughing, close contact, or touching objects someone else then handles.
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    A cold is an infection in the upper respiratory tract. Colds are caused by a virus.
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    A middle ear infection is caused by swelling in the tube between the middle ear and the throat called the Eustachian tube. The swelling traps fluid in the middle ear, allowing bacteria to grow and cause infection.

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