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https://www.news-medical.net/news/2...er-duvet-lung-disease-nearly-kills-a-man.aspx
[h=1]Mysterious feather duvet lung disease nearly kills a man[/h] By Angela Betsaida B. Laguipo, BSN Nov 19 2019
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Feather duvet lung (FDL) is a rare subgroup of bird fancier’s lung (BFL), caused by the inhalation of organic dust due to goose or duck feathers in duvets or pillows. BFL is a type of hypersensitivity pneumonitis induced by inhalation of bird-related antigens. Diagnosing this disease is difficult because feathers are not generally recognized as a causative antigen of BFL....