Who are passive smokers? What risk are they at?

Passive smokers are people who are in the company of smokers. Tobacco smoke causes them headache, malaise, decreased performance, rapid fatigue, exacerbation of diseases of the upper respiratory tract.
A non-smoker, being in the room with a smoker for one hour, in fact, smokes half of the cigarette.
He has negative changes in the activity of the nervous system, the composition of blood and urine is disturbed. Passive smokers are at risk of malignant neoplasms not only in the lungs, but also in other organs. Passive smoking is especially dangerous for children.

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