Under Corona-appreciated danger: researchers addressed an urgent appeal to the WHO

More than 200 scientists of various disciplines have addressed an appeal to the WHO and health authorities. Request an update to the Corona-guidelines, since the aerosol transmission is not sufficiently taken into account. Even medical experts have already spoken about.

The Transmission of the Coronavirus on aerosols must be taken more seriously. The researchers claim in a commentary published in the journal “Clinical Infectious Dieseases”. 239 scientists have signed this appeal.

As an Aerosol suspended in the air droplets which are smaller than five microns. Each person gives such a fine mist when you Exhale, Talk, Laugh or Sing. The evidence that the causative agent of Sars-CoV-2 about this floating droplet can be transferred, and that standing or only circulated air in closed environments, the risk of infection with corona virus is significantly increased, had increased in the last few months. Aerosols can hover in confined spaces for hours in the air.

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Aerosols as a key mode of Transmission

Many studies, for example, Mers-CoV, and Influenza have shown, the authors of the appeal argue, that could spread this virus via aerosols. “We have every reason to believe that Sars-CoV-2 behaves similarly and aerosols are a key Transmission path,” it says in the comment.

The role of these aerosol transmission of the pandemic would not recognise the WHO and other public health organizations enough, my scientists. Therefore, you would not sufficiently taken into account in recommendations for protective measures.

It must be taken measures for the prevention

Hand-washing and Social Distancing are appropriate, but insufficient to protect against Virus-carrying to ensure that air particles that are emitted from diseased people. This applies in particular for enclosed spaces. Therefore, the authors call for, in particular, three measures, namely:

• to guarantee a sufficient and effective ventilation (supply of fresh air from the outside, air circulation to avoid), and in particular in public buildings, workplaces, schools, hospitals and homes for the elderly
• To expand ventilation, for example, by Extraction and air filtration system or germicidal, ultra-violet light
• crowded spaces and crowds of people generally to be avoided, in particular in terms of public transport and public buildings

“Call WHO would be warranted from a scientific point of view, urgently”

“In the face of still rising global infection would be numbers at the same time the implementation of easing measures in some countries, a call of the WHO for the protection against SARS-CoV-2-containing aerosols is desirable, and from a scientific point of view, urgently needed,” commented the physician Clemens Wendtner, the first of the German-Corona-treated patients.

“Just aerosols with a particle size below five microns can spread in a cough attack up to ten meters in a closed room. There are numerous publications on infection chains in Restaurants without a demonstrable direct contact of the visitors with each other,“ explains Schwabing district, the chief doctor of the infectious diseases and tropical medicine at the Munich clinic. Same is true for choir performances, or especially from a German point of view, for the contagion of employees in large slaughterhouses, the “most likely to be caused by multiple circulation of unfiltered cooling” air.

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