Common cold
Alternate Names : Upper respiratory infection - viral, Cold
Pictures & Images
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Throat anatomy
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Structures of the throat include the esophagus, trachea, epiglottis and tonsils.
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Cold symptoms
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Colds are caused by a virus and can occur year-round. The common cold generally involves a runny nose, nasal congestion, and sneezing. Other symptoms include sore throat, cough, and headache. A cold usually lasts about 7 days, with perhaps a few lingering symptoms such as a cough for another week.
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Antibodies
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Antigens are large molecules (usually proteins) on the surface of cells, viruses, fungi, bacteria, and some non-living substances such as toxins, chemicals, drugs, and foreign particles. The immune system recognizes antigens and produces antibodies that destroy substances containing antigens.
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