Scientists have demonstrated: too little humidity in indoor air increases the risk of coronavirus infection

Who had even heard of ‘aerosols’ a year ago? It is now clear that these long-living infectious particles floating in the air are responsible for the majority of Corona infections. The renowned aerosol specialist Prof. Dr. Alfred Wiedensohler from the Leibniz Institute for Tropospheric Research (TROPOS) in Leipzig warns that “in cold and temperate climates, the indoor climate is usually very dry during the heating season. This could promote the spread of coronaviruses”. This is because at higher air humidity, the droplets grow faster and fall to the ground earlier, and can therefore be inhaled less by healthy people.

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Coronavirus floats in the air: Why restaurants should ensure sufficient air humidity

Restaurants reopening is now on the agenda. And that’s because this is exactly where a renewed risk of infection lurks, in the form of so-called aerosol particles, i.e. the smallest infectious airborne particles, explains physicist Roland Netz from the Freie Universität Berlin, advising professional humidification. This way, droplets are not able to shrink so quickly and heavier droplets tend to sink to the floor. And he also rightly says: “Also the mucous membranes will otherwise dry out and become more susceptible to viruses.” Even the German Hotel and Restaurant Association (DEHOGA Bundesverband) recommends the use of humidifiers in this context.

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