Introduction Pneumonia is a lung infection that can range from mild to life-threatening, especially for vulnerable groups like young children, older adults, and individuals with chronic health conditions. While symptoms may appear similar across all ages, subtle differences in presentation can make pneumonia harder to recognize, particularly in the elderly and infants. This article explores the key symptoms of pneumonia in adults, children, and seniors, helping you identify warning signs early and seek timely medical care. What Is Pneumonia? Pneumonia occurs when the air sacs (alveoli) in the lungs fill with fluid or pus due to an infection caused by…