Name one serious complication associated with influenza.

Pneumonia is a serious complication associated with influenza because the virus can severely impact the respiratory system, leading to viral pneumonia or secondary bacterial pneumonia. Influenza weakens the immune system and damages the respiratory epithelium, creating an environment where bacteria can easily invade and multiply. This can result in significant morbidity and even mortality, especially in high-risk populations such as the elderly, young children, and individuals with underlying health conditions.

While asthma can be exacerbated by influenza, it is not primarily a direct complication of the virus itself. Chronic cough may be a symptom experienced during or following an influenza infection but does not represent a serious complication. A rash is not typically associated with influenza, further highlighting why pneumonia stands out as a critical concern.