A team led by researchers at the University of California, Riverside, has found that acute exposure of the skin to thirdhand smoke (THS) elevates biomarkers associated with the initiation of skin diseases, such as contact dermatitis and psoriasis. THS comprises the residual pollutants from tobacco smoke that remain on surfaces and in dust after tobacco has been smoked; it can remain on indoor surfaces indefinitely, causing potentially harmful exposure to both smokers and non-smokers. “We f...