In 2009 a study was released to reveal the percentages of people reporting they experience adverse effects from scented products such as air fresheners and laundry products vented outside. .
Researches, Stanley M. Caress and Anne C. Steinemann discovered that, “…30.5% of the general population reported scented products on others irritating, 19% reported adverse health effects from air fresheners, and 10.9% reported irritation by scented laundry products vented outside.” Of course they also found that the percentages were higher with those with asthma and chemical sensitivity (Prevalence of fragrance sensitivity).
ARTICLE RESOURCE:
Caress, SM, Steinemann, AC (2009) Prevalence of fragrance sensitivity in the American population. Journal of Environmental Health 2009 Mar; 71(7); 46-50. PubMed.gov.