BOSTON – People with elevated blood levels of a toxic chemical called perfluorobutanoic acid (PFBA) were found to have increased risk of a more severe course of COVID-19 than those who did not have elevated levels, according to a new study. PFBA is part of a class of man-made chemicals known as perfluorinated alkylate substances (PFASs), which have previously been shown to suppress immune function.
PFASs have water- and grease-resistant properties and are used in a wide variety of products, including nonstick cookware – and water-proof clothing. Several brands continue to use such chemicals in their collections to provide water, stain and oil repellence properties. PFBA, more than other PFASs, is known to accumulate in the lungs, according to the study.
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