https://www.academie-medecine.fr/peut-on-rouvrir-sans-danger-les-etablissements-thermaux/ 2021 France coronavirus infections pneumonia, viral scientific and technical information health resorts quercus robur pandemics COVID-19
--- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7773044 2021 France pneumonia, viral coronavirus infections journal article quercus robur skin diseases, vesiculobullous occupation, nos work risk Labor ; manpower ; population pandemics COVID-19