Masks are particularly important because they prevent people infected with the new coronavirus from transmitting the virus.
To prevent new cases of Covid-19, experts have not yet reached a consensus when it comes to the use of masks: while some advocate its use by everyone, others believe the practice is not necessary. To show the advantages of wearing masks, the German company LaVision has produced a video that allows you to view the airflow around a person when they are talking or coughing.
“A simple Schlieren imaging technique is applied to visualize the air flow caused by a person breathing and coughing,” wrote the company spokesmen when they shared the video. “Using a face mask, the flow of exhaled air is blocked, effectively reducing the risk of infection. Also nicely shown is the heat transfer from the body to the cooler ambient air.”
For those who do not know, the masks are particularly important because they prevent people infected with the new coronavirus from transmitting the microorganism – even when they still do not show symptoms of Covid-19.
One problem with the use of disposable masks by all people, however, is that it may lead to a shortage of the product for healthcare professionals and other specialists who are working on the front lines against the pandemic. For this reason, the recommendation of the authorities has been, in addition to social distancing and constant hand hygiene, the manufacture of homemade masks that can be cleaned and reused.