India, Nov. 27 -- Winter often brings a surprising contradiction: even though the season feels calm, indoor air quality tends to decline sharply. With windows kept shut to stay warm and outdoor pollution seeping in, the air inside the home can become dense with irritants. This creates a setting where breathing may feel heavier, especially for those already dealing with asthma, nasal congestion, or recurrent throat discomfort. The respiratory system bears the brunt of this seasonal shift. Pollutants can irritate the airways, trigger coughing, and make the lungs work harder than usual. Children, older adults, and individuals with existing sensitivities are particularly vulnerable during these months. That's why focusing on indoor protection...