Ophthalmology

Mayo Clinic Q and A: Relief for dry eyes

DEAR MAYO CLINIC: Since the beginning of winter, my eyes feel dry and scratchy. I can no longer wear contacts because my eyes burn and sting, and are watery. How can my eyes be dry and watery at the same time, and what can ...

Oncology & Cancer

Lung cancer: It is about more than smoking

World Cancer Day is February 4 and that makes this the ideal time to talk about lung cancer and smoking. Internationally, lung cancer is the most common cause of cancer deaths and the World Health Organization estimates that ...

Attention deficit disorders

Secondhand smoke exposure linked to odds of ADHD symptoms

(HealthDay)—Exposure to secondhand smoke (SHS) from pregnancy to childhood is associated with increased odds of having attention-deficit/hyperactivity disorder (ADHD) symptoms and subtypes, according to a study published ...

Health

No level of smoke exposure is safe during pregnancy

Nearly a quarter of pregnant women say they've been around secondhand smoke—in their homes, at work, around a friend or relative—which, according to new research, is linked to epigenetic changes—meaning changes to how ...

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Passive smoking

Passive smoking is the inhalation of smoke, called secondhand smoke (SHS) or environmental tobacco smoke (ETS), from tobacco products used by others. It occurs when tobacco smoke permeates any environment, causing its inhalation by people within that environment. Scientific evidence shows that exposure to secondhand tobacco smoke causes disease, disability, and death.

Passive smoking has played a central role in the debate over the harms and regulation of tobacco products. Since the early 1970s, the tobacco industry has been concerned about passive smoking as a serious threat to its business interests; harm to "innocent bystanders" was perceived as a motivator for stricter regulation of tobacco products. Despite an early awareness of the likely harms of secondhand smoke, the tobacco industry coordinated to engineer a scientific controversy with the aim of forestalling regulation of their products. Currently, the health risks of secondhand smoke are a matter of scientific consensus, and these risks have been one of the major motivations for smoking bans in workplaces and indoor public places, including restaurants, bars and night clubs.

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