Which symptoms are red flags regarding a chronic cough?

Increased weight gain is not typically associated with chronic cough and may suggest other health issues unrelated to respiratory conditions. While recurrent pneumonia is a concern, decreased sputum production does not necessarily signify a serious underlying cause, making this combination less indicative of red flags.

Increased energy generally suggests good health rather than a warning sign. While recurrent pneumonia is concerning, decreased sputum production alone does not indicate a severe condition, and the combination lacks critical symptoms that would qualify as red flags for a chronic cough.

Although recurrent pneumonia raises concern, being a previous smoker and having increased weight gain do not directly indicate serious underlying issues related to chronic cough. This option does not include significant warning symptoms like dysphagia or unintended weight loss.