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when are you most contagious with a bad cold when are you most contagious with a head cold when are you no longer contagious with a bad cold when are you no longer contagious with a head cold when are you most infectious with a head cold when are you no longer contagious after a bad cold when are you no longer contagious after a head cold is a cold contagious after 7 days is a cold contagious after 2 weeks how many days after a cold are you still contagious
