Secondhand smoke contains over 7,000 chemicals, including at least 250 toxins and about 70 carcinogens. These harmful substances include nicotine, carbon monoxide, formaldehyde, benzene, arsenic, ammonia, and hydrogen cyanide. Nonsmokers exposed to secondhand smoke face similar health risks as smokers, increasing their chances of developing various illnesses.

Secondhand smoke is linked to a higher risk of heart problems such as heart attacks and strokes. The chemicals in secondhand smoke can narrow blood vessels, raise blood pressure, and promote blood clots, all contributing factors to heart disease.

Secondhand smoke can cause various respiratory issues, including coughing, wheezing, shortness of breath, and an increased risk of asthma. It can also exacerbate bronchitis and pneumonia. The irritants and pollutants in secondhand smoke can trigger allergic reactions and inflammation, leading to discomfort and respiratory distress.

Children are particularly vulnerable to the effects of secondhand smoke because their lungs and immune systems are still developing. Infants exposed to secondhand smoke before or after birth have a higher risk of sudden infant death syndrome (SIDS). Pregnant women who inhale secondhand smoke are more likely to have low-birthweight babies, leading to complications such as developmental delays and weakened immune systems.

Secondhand smoke is a significant risk factor for both ischemic and hemorrhagic strokes. The toxins in secondhand smoke can damage blood vessels and disrupt normal blood flow to the brain.

Nonsmokers exposed to secondhand smoke may experience increased stress, anxiety, and depression due to the physiological and psychological effects of the toxins. Children and adolescents may also face reduced concentration and memory problems.

Le Nguyen (Times of India)