Pneumonia

An infection that inflames the air sacs in one or both lungs, which may fill with fluid, causing cough with phlegm, fever, chills, and difficulty breathing. It can range from mild to life-threatening, particularly in young children, older adults, and people with weakened immune systems or chronic conditions — making prompt medical evaluation important rather than assuming it's a routine chest cold.

This information is for general awareness only and does not replace professional medical advice. Consult a doctor for diagnosis and treatment.