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Bota

Does it make sense to keep the mask off? DW: How high is the risk of coronavirus infection in nature?

Does it make sense to keep the mask off? DW: How high is the risk of coronavirus

The chance of infection in nature from the virus is significantly lower than indoors - either from the initial variant or from mutations in the virus. Aerosols in the air play a crucial role in the spread of coronavirus. According to experts outside aerosols very quickly lose the danger. "This has to do with the fact that the air circulation outside is greater. "Having wind currents, the dilution effect happens very quickly," Nico Mutters, director of the Institute of Hygiene and Public Health at the University of Bonn Clinic, told DW. Even Birgit Wehner, an aerosol researcher at the Leibniz Institute for Troposphere Studies, says the droplets, which come out of the breathing process, dry out and dilute faster. A statement from the Association for Aerosol Studies, also signed by Wehner,

So even outside the rules of distance 1.50 to 2 meters must be observed. "If you do not keep your distance and stand face to face with each other and speak loudly, sing or spit, then you can become infected through infectious aerogens," virologist Alexander Kekulé told DW. He is known in the media for his criticisms of government measures. According to him, the virus should be transported without being limited to the way of life.

The regulation of distance conservation must also be observed for virus mutations. "Mutants do not fly further, that's important to say," Kekulé said. They are a little more sticky, but that makes no difference to the restrictive measures. Kisses and hugs should also be avoided. During normal movements - like a short jump side by side - there is almost no risk. Studies confirm that the risk of getting infected outside is minimal. A study from China e.g. proves, that out of 7324 registered infections only one occurred outside. The Robert Koch Institute in Germany also writes on its website that infections outside in space are very rare.

Does wind play a role in the spread of the virus?

"The more smell there is, the more the cloud of aerosols emitted by humans is pushed back," explains physicist and aerosol researcher Gerhard Scheuch. If the distance is observed it is unlikely to have the adhesive effect of aerosols.

In an interview with DW Scheuch says that "only through the warmth of the body in the atmosphere is created a stream of air, which normally goes up like a chimney." Because the body temperature is generally 37 degrees higher than the ambient temperature. "The warm air goes up and the aerosol cloud goes up that way." Another study in Iran proves that air does not play a role in the transfer of infectious aerosols.


Does it matter if it is cold or warm outside?

Kjo pyetje nuk ka marrë ende përgjigje përfundimtare prej studiuesve. Studiues amerikanë kanë hulumtuar infeksionet në rajone të ftohta, të ngrohta dhe me lagështirë në Kinë dhe nuk kanë gjetur ndonjë korelacion mes kushteve klimatike dhe numrit të infeksioneve. Ndërsa një studim austriak konfirmon, se rrezatimi ultraviolet i shkatërron viruset. „Rrezatimi ultraviolet ka një efekt minimal në infeksionin nga njeriu tek njeriu”, theksojnë studiuesit, megjithatë infeksioni mund të ndodhë për pak minuta.

Edhe ekspertët e pyetur nga DW kanë mendime të ndryshme. Nico Mutters vëren, se nuk mund të thuhet në mënyrë përgjithësuese që në stinën e nxehtë rreziku është më i ulët se sa në stinën e ftohtë. “Vërtetë në verë ka një rrezatim më të lartë ultraviolet, por të njëjtat vlera përmes reflektimit mund të arrihen edhe në hapësirat e skijimit me borë. Po ashtu në mbarë botën ka infeksione pavarësisht nga klima e ngrohtë apo e ftohtë në rajone të ndryshme. Por virologu Alexander Kekulé thotë, se infeksionet edhe në vendet e ngrohta ndodhin në mjediset e mbyllura dhe jo jashtë në natyrë.

A ka kuptim mbajtja e maskës jashtë?

Outside it is reasonable to wear masks when the distance between people can not be respected. If people are dense in mass and there is no possibility of avoidance masks should be worn. Even in performance or concert venues, at train and bus stations or while standing in line, experts recommend keeping your distance and wearing a mask./DW

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