Harvard Health Tips

Persistent colds

In about 25% of colds, the person has persistent symptoms, such as a nagging cough that lasts for several weeks. A much smaller number of people develop another illness in addition to the cold, such as an ear or sinus infection. Others may develop bronchitis or a worsening of their asthma. These illnesses may appear at the same time as the cold, when the cold symptoms are starting to fade, or even after cold…

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