As Delhi’s smog thickens, doctors warn of rising respiratory infections this winter.

By Aniket Chakraborty Oct 22, 2025 Arrow HEALTH & WELLNESS

The air is filled with PM2.5 and PM10 particles—tiny pollutants that enter deep into the lungs.

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These particles damage cilia, the lung’s natural cleaning system, weakening its defenses.

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Polluted air allows viruses and bacteria to enter easily, causing frequent infections.

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Studies show high pollution suppresses immune cells like macrophages and natural killer cells.

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Cold, dry winter air lets pollutants and viruses linger longer—making Delhi’s air more dangerous.

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Children and the elderly face the highest risk, with lung growth and immunity most affected.

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Pollution may even accelerate antibiotic resistance, creating tougher infections to treat.

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Fine particles enter the bloodstream, harming the heart, brain, and kidneys—not just lungs.

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Doctors advise N95 masks, air purifiers, flu vaccines, and antioxidant-rich diets for protection.

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