Latex Allergens in the Ear Straps of Face Coverings and Masks in the UK: Initial Findings

The SARS-CoV-2 pandemic led to an unprecedented demand for PPE and generated a small-scale industry making personalised face coverings. Concerns had been raised about the use of natural rubber latex (NRL) as elastomeric material, with its health risks. We have investigated levels four NRL allergens total protein in ear-straps manufactured coverings material sold their production, number imported N95/KN95 masks. None samples identified whether was involved or not. masks were low not detectable; 3/10 showed above limit detection, probably reflecting low-level cross-contamination during manufacture. Three batches “the manufacture ear straps coverings” significant but variable allergen (250–2526 ng/g material). Historically, extractable measurements used indicator possible proteins. This study apparent sample extracts without measurable confirmation by electrophoresis. Therefore, immunochemical measurement remains key rule out potential cause latex-related problems.