Fall in Omaha can change gears quickly. One weekend may be perfect for apple picking, a pumpkin patch, or a Saturday football game, while the next has everyone reaching for jackets. Add school schedules, indoor gatherings, and the beginning of respiratory virus season, and coughing and sniffling can suddenly seem to be everywhere. So what happens when you wake up with a sore throat and stuffy nose? Is it a cold? Could it be influenza ...