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In addition to cigarette smoking, several studies have highlighted biomass fuels, air pollutants, workplace dust and fumes, a history of respiratory infections, poor nutrition, and socioeconomic disadvantage as notable risk factors for COPD 6,7

The exact triggers for SCV emergence are not fully understood but stressful conditions including antibiotic pressure 61 , nutrient limitation 62 and chemical stresses generated by the host 40 are known to induce SCV formation

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EFFECTIVENESS OF SURGICAL MASKS AGAINST SMOKE Surgical masks can provide some level of protection against smoke particles, but their effectiveness may vary