CONTROVERSIES IN HOSPITAL INFECTION PREVENTION
Einen spannenden Überblick über Übertragungswege von Covid-19 und Faceshields als Infektionsschutz bietet das Blog des U.S. Mikrobiologen und Epidemiologen Dan Diekema und des Epidemiologen Mike Edmond. Face Shields and Containment of COVID-19,
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Empfehlungen der Weltgesundheitsorganisation WHO:
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Infektiöse Tröpfchen können beim Sprechen übertragen werden: Stanfort University, 13th of May 2020Abstract: Speech droplets generated by asymptomatic carriers of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are increasingly considered to be a likely mode of disease transmission. Highly sensitive laser light scattering observations have revealed that loud speech can emit thousands of oral fluid droplets per second. In a closed, stagnant air environment, they disappear from the window of view with time constants in the range of 8 to 14 min, which corresponds to droplet nuclei of ca. 4 μm diameter, or 12- to 21-μm droplets prior to dehydration. These observations confirm that there is a substantial probability that normal speaking causes airborne virus transmission in confined environments.
https://www.pnas.org/content/early/2020/05/12/2006874117 |
Klinische Anwendung von Faceshields bereits in der 50er Jahren:
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