> as far as risk factors for lung cancer, second-hand smoking is one of the better known. The risk is real and measurable, but to put that in perspective: the

> as far as risk factors for lung cancer, second-hand smoking is one of the better known. The risk is real and measurable, but to put that in perspective: the CDC summary says it increases risk by 20-30%, so 130% over baseline to take the higher number https://www.cdc.gov/tobacco/secondhand-smoke/health.html https://www.cdc.gov/tobacco/secondhand-smoke/health.html For smokers, the risk is 15-30 times baseline, so 3000% over baseline for the high end https://www.cdc.gov/cancer/lung/basic_info/risk_factors.htm https://www.cdc.gov/cancer/lung/basic_info/risk_factors.htm The article indicates a 260% increased all-factor risk for never-smoking Asian women, compared to White women. There has to be more going on than just second-hand smoke exposure.