Is it a cold … or is it the flu?
Karen Miller | 11/11/2013, 6 a.m.
Both the flu and common cold are respiratory illnesses caused by different viruses. They also share many of the symptoms, but the symptoms of the flu are more severe and can result in serious complications, including pneumonia and bronchitis, which can be fatal. Colds tend to center in the head, while the flu is felt all over.