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However, the researchers did find an association between air pollution and people with diabetes, who are at a higher risk of stroke. In fact, the study showed that on a polluted day, those with diabetes were about 11 percent more likely to have a stroke than on a relatively "clean" day.
"Those with stroke risk factors, like diabetes, may be at increased risk (from air pollution), but clearly more studies are needed," Dr. Gregory A. Wellenius of Brown University, a researcher in the study, told the news source.
According to the Mayo Clinic, a person suffers a stroke when the blood supply to part of the brain is significantly reduced or interrupted.