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).
Other Causes of the Common Cold. About 10% to 15% of adult colds are caused by viruses also responsible for other, more severe respiratory illnesses. The causes of 20%-30% of adult colds, presumed to be viral, remain unidentified.The same viruses that produce colds in adults appear to cause colds in children.ow and When They Strike. Cold viruses have a lot in common, but each type has its own style, too. Rhinovirus. This bunch is most active in early fall, spring, and summer. They cause 10%-40% of colds. You'll feel plenty miserable when you catch one, but the good news is they rarely make you seriously sick. Coronavirus.