causing or capable of causing death; mortal; deadly: a fatal accident; a fatal dose of poison. causing destruction, misfortune, ruin, or failure: The withdrawal of funds was fatal to the project. decisively important; fateful: The fatal day finally arrived.
Extreme cold spells may come. Submitted by Erika (not verified) on Mon, 2009-09-28 13:40. Extreme cold spells may come from bad circulation (the blood not flowing properly) or from the thyroid (low thyroid function leads to a lower body temperature).
Under normal circumstances, how long should a cold last? Well, the usual duration of a common cold spell is about 5-7 days, which should not extend beyond 10 days under any circumstances, if the individual suffering from it is of normal health and has a fairly strong immune system.