Fall in North Texas doesn’t always arrive with an immediate blast of sweater weather. Warm afternoons can stick around even as school schedules, football games, pumpkin patches, festivals, and Halloween activities in Allen signal that a new season is underway. Unfortunately, the respiratory illness season doesn’t wait for the temperature to cooperate. If you suddenly develop a cough, sore throat, congestion, fever, or fatigue, figuring out what caused it can be surprisingly difficult ...