Winter smog in Delhi poses serious health risks, particularly from PM2.5 particles that can penetrate deep into the lungs. Vulnerable groups, including children, the elderly, and those with pre-existing conditions, face heightened risks of respiratory and cardiovascular issues. Summer pollution, while less visible, can lead to elevated ozone levels, causing respiratory irritation and exacerbating asthma. Both seasons present distinct challenges, requiring year-round monitoring and mitigation efforts to protect public health.