Common Cold: Symptoms, Self‑Limiting Course & Risks for Vulnerable

The common cold arises from an acute viral infection of the upper respiratory tract and presents with cough, sputum, nasal congestion, and sore throat. It is generally a mild illness that resolves naturally without specific treatment, classifying it as a self‑limiting disease. While the cold itself is usually benign, viral infections like COVID‑19 and seasonal influenza pose heightened concerns for high‑risk populations—including the elderly, infants, pregnant women, and patients with chronic conditions. In these groups, the infection can be accompanied by complications such as acute encephalitis or pneumonia, and fatal outcomes have been reported.