common cold is caused by what for class 4
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1
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Colds happen when a virus irritates (inflames) the lining of the nose and throat. Colds can be caused by more than 200 different viruses. But most colds are caused by rhinoviruses
Answered by
1
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In contrast to the flu, a common cold can be caused by many different types of viruses. The condition is generally harmless and symptoms usually resolve within two weeks.
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