Winter smog poses significant health risks, particularly for vulnerable populations such as children, older adults, and those with pre-existing respiratory or heart conditions. Symptoms include dry cough, throat irritation, burning eyes, and chest tightness. Severe cases may lead to hospitalisation due to acute respiratory illnesses. Prolonged exposure to smog can result in chronic lung diseases and increased mortality rates. Outdoor workers, such as traffic police and delivery personnel, face heightened exposure and are advised to undergo regular lung function tests.