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Criticism of transparent masks has consequences. The popular plastic protection for the mouth and nose has been re-evaluated by the Bavarian Ministry of Health and classified as inappropriate. Recently, scientists at the University of Munich had shown that aerosols spread largely unhindered to the sides and, with a slight delay, upwards as well, because a considerable gap is left between the plastic and the face.
Sprays are not only released when you speak, but also when you breathe. “Since they are significantly smaller than the drops, it is particularly important that the mouth and nose are tightly pressed against the skin to minimize a release to the side or downward,” shares a spokesman for the Bavarian Ministry of Health in SZ- Apply with. “That is why a mouth-nose cover is a tight-fitting textile barrier, covering the mouth and nose that, by its nature, is suitable for reducing the spread of transmissible droplet particles and aerosols through breathing, coughing, sneezing and pronunciation, regardless of a label or certified protection category. “
Only tight-fitting masks are considered safe. But there is a gap in clear vision protection
In the past, the focus has been on avoiding droplet infections, which are already aided by simple hygiene measures. “In an initial assessment, this also applied in isolated cases to the use of unconventional everyday masks,” the spokesperson said. By the end of September, the ministry had equated the vented plastic device with everyday masks. Since knowledge about the coronavirus is now ‘very advanced’ and it is considered certain that, in addition to transmission by droplets, this can also take place via aerosols, “various mouth and nose covers were reassessed and evaluated in terms of its general suitability for protection against infection “.
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The State Office of Health and Food Safety (LGL) has specified the requirements for covering the mouth and nose from an infection hygiene point of view: “Since aerosols are significantly smaller than the drops, it is particularly important that the mouth and nose conform well to the skin, also to minimize lateral or bottom release. ” Spotty coverage is not enough. The State Ministry of Health and Care expressly agrees with this assessment, the spokesperson said. Therefore, the infection protection law requirements for covering the mouth and nose are being revised to the extent that only a tight-fitting textile barrier covering the mouth and nose should be used as a covering for the mouth and nose. nose to reduce aerosols. “Transparent masks made of plastic, even if they are tight-fitting, do not regularly meet these requirements for covering the mouth and nose and are therefore more or less the same as visors.”
