The tight confines of the airplane gave them especially heavy doses of secondhand smoke.
Interestingly, the biggest benefit from limiting secondhand smoke is from reduction in cardiac disease.
And Aden, a 7-year-old boy from New York, who has asthma attacks from secondhand smoke.
In each case, more people diagnosed with sinusitis reported being exposed to secondhand smoke.
Although the link between sinusitis and secondhand smoke might seem obvious, few studies have examined it.
"People really need to stop smoking and stop being around secondhand smoke, " he says.
The Environmental Protection Agency has classified secondhand smoke as a known human cancer-causing agent.
CNN: Study: Smoke-free laws may cut heart attack hospitalizations
Numerous studies of secondhand smoke have been completed over the past 40 years.
Secondhand smoke, which is also called environmental tobacco smoke, is smoke inhaled involuntarily.
According to a new study, secondhand smoke may be responsible for up to 40 percent of cases of chronic sinusitis.
Worldwide, it is estimated that exposure to secondhand smoke caused 50, 000 lung cancer deaths and 379, 000 heart disease deaths in 2004.
Full or partial smoking bans would reduce secondhand smoke drifting between apartments, prevent cigarette-related fires, and even help smokers quit, they argue.
Secondhand smoke also causes lung cancer, heart and lung disease in non-smokers.
Tammemagi and his colleagues aren't certain how secondhand smoke might cause sinusitis.
The initial studies showing that secondhand smoke is dangerous compared nonsmoking spouses of smokers with age-matched nonsmoking controls who were married to nonsmokers.
Secondhand smoke exposure causes eye irritation, asthma and other acute respiratory diseases and is thought to be a cause of infant crib death.
Now, two large studies suggest that communities that pass laws to curb secondhand smoke get a big payoff -- a drop in heart attacks.
CNN: Big drop in heart attacks after smoking bans, studies say
The French government adopted the ban after figures showed smoking was on the rise, and that an estimated 5, 000 people a year die of secondhand smoke.
"If 40 percent of chronic rhinosinusitis is caused by secondhand smoke, you're in a good position to eliminate...those cases if you eliminate secondhand smoke, " he says.
But surprise, surprise most Parisians interviewed in the French Press said they actually like being able to smell food and breathe freely in cafes without worrying about swallowing secondhand smoke.
Secondhand smoke can increase the risk of respiratory ailments, lung cancer, and heart disease in nonsmokers, and the risk of sudden infant death syndrome and middle ear infections in children.
Overall, the researchers found, breathing secondhand smoke in private social settings nearly tripled the risk of being diagnosed with sinusitis, while breathing it at work more than doubled the risk.
Children are also destined to long-term secondhand smoke exposure.
More than 50 percent of those with sinusitis said they'd inhaled secondhand smoke at private parties and social functions, compared with just 28 percent of those who did not have sinusitis, for instance.
Reportedly, this North Carolina-based startup plans to bring a "nicotine-delivery product" to market which would actually "deliver nicotine to the brain faster and safer than cigarettes, " all while protecting children and nonsmokers from secondhand smoke.
ENGADGET: Next Safety developing nicotine-delivery device to curb smoking
He said tackling exposure to secondhand smoke at work, which causes more than 600 deaths each year across the UK, would help and backed a new call for a total ban on smoking in public plances.
The survey, jointly conducted by the China Center for Disease Control, the U.S. Centers for Disease Control and Prevention and the World Health Organization, shows that seven out of 10 adults reported being exposed to secondhand smoke in a typical week.
Secondhand smoke and third-hand smoke -- the toxic residue left behind on walls, carpets, and clothes long after a cigarette is extinguished -- are bad news, especially for children, pregnant women, people with chronic illnesses, and the elderly, Winickoff and his colleagues note.
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