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| | More on Cold |
 | | Whether cold, or humid climate can affect transmission by other means, such as by affecting the immune system, or ICAM-1 receptor concentration, or simply increasing the amount and frequency of nasal secretions and frequency of hand to face contact has not yet been thoroughly tested and is not known. |
 | | Colds are somewhat more common in winter since during that time of the year people spend more time indoors in close proximity of others and ventilation is less, increasing the infection risk. |
 | | Common home remedies include camomile tea, chicken soup, nebulized medicinal mixtures, hot compresses, mustard plasters, hot toddies, Licorice, vitamin C, and Echinacea, although despite several scientific trials there is no evidence that the final two have a beneficial effect. |
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