DOI:
10.1055/s-00000137
Krankenhaushygiene up2date
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References
Bae S, Kim MC, Kim JY. et al.
Effectiveness of surgical and cotton masks in blocking SARS-CoV-2: a controlled comparison in 4 patients.
Ann Intern Med 2020; M20-1342
DOI: 10.7326/M20-1342.
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