DOI: 10.1055/s-00000031

Klinische Monatsblätter für Augenheilkunde

Referenz

Centers for Disease Control and Prevention (CDC).
Recommendation Regarding the Use of Cloth Face Coverings, Especially in Areas of Significant Community-Based Transmission.
Available at:
https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover.html%23studies Accessed 14.04.2020

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