A cold is a common mild viral infection and there’s usually no need to see your GP: it should clear within a week or two. Contact your GP if your symptoms persist for more than 3 weeks or get suddenly worse.
Source: Common cold @ NHS Choices
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- Coping With Colds @ TeensHealth
Excerpt: Cold symptoms usually appear 2 or 3 days after a person has been exposed to a source of infection. People with colds are most contagious for the first 3 or 4 days after the symptoms appear and may be contagious for up to 3 weeks. Although some colds can linger for as long as 2 weeks, most clear up within a week.
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