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Continue to Chathttps://forschung.kssg.ch/de/publikationen/10793-impact-of-respirator-versus-surgical-masks-on-sars-cov-2-acquisition-in-healthcare-workers-a-prospective-multicentre-cohort
https://forschung.kssg.ch/de/publikationen/10793-impact-of-respirator-versus-surgical-masks-on-sars-cov-2-acquisition-in-healthcare-workers-a-prospective-multicentre-cohort