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The common cold is the most common human disease. Well over 200 viruses are implicated in the cause. Rhinovirus caused colds are most infectious during the first three days of symptoms. A person with the symptoms has already caught the cold. The time before the infection begins and when the symptoms show is between 1-3 days. It is a matter of discussion whether or not a person who doesn't show signs and symptoms of a cold are contiguous. The reason for the lack of information is due to the cost of looking into this.

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12y ago

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