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Why is the mask important, even if it is uncomfortable for everyone? The creators of a popular show running on YouTube have demonstrated this using a special filming technique. They showed how much the number of particles differs, whether we wear a mask or not. The experiment was discussed by Dr. Anthony Fauci, director of the US Institute of Infectious Diseases.
Experiment Creator: “This is the recording I did, 1000 frames per second, which is about 40 times slower than real time. That while I counted from 1 to 4. That means the numbers you can see at the bottom of the screen. I was amazed at the amount of particles that came out of my mouth. Not only when we spit, not only at the beginning of each word, but also when we finish speaking. Especially in word four, you can see the fine steam coming out of my mouth. It was really amazing. You can see it with the naked eye: the particles are so small that they don’t fall (to the ground – no), I didn’t even speak very loud. It was a medium volume. “
Misconceptions about how we get infected
Dr. Anthony Fauci: “I think what you have just shown us is a very beautiful demonstration from a graphic point of view of the importance of wearing masks, because, as we see in the recording, it says the same thing: one, two, three, four … and very few particles pass through the mask. So we keep saying, and I think graphic demonstrations like the one you showed us reinforce this, that one of the reasons why it is so important to cover our faces is that we now know that 40-45% of infected people have no symptoms. And yet, the virus is present in the nasal part of the pharynx. We also know that a substantial part of the infections comes from people without symptoms. This is why many people have an easy, albeit wrong, interpretation that you can only transmit the virus when you cough or sneeze next to another person. What people don’t understand is that then when you speak, even if you don’t speak out loud, or when you sing, which is much worse than speaking, these particles are removed from your mouth, which can remain in the air for a while, some fall to the ground, so we recommend the distance of two meters between people, but some of them are transported by aerosols and can float for a while. That is why the use of masks is so important, especially when we think that we are in a situation in which no one coughs or sneezes. You showed it very well, simply saying: one, two, three, four ”.
Experiment with SARS-CoV-2. Which mask best protects healthy people?
On the other hand, another experiment shows that no protective mask fully protects those around it from coronavirus infection, unless the sick person wears it. test it the world’s first test with the SARS-CoV-2 virus, held in Japan. The scientists used two mannequins: in one case they used a spray to spread the virus, and in the other, a fan that mimicked human respiration.
The test showed that Healthy people using a cloth mask enjoy only 17% protection.
The proportion has increased to 50% in the case surgical masks and 80% for those with protection filter.
Things change when the infected person wears the mask: so, the reduction of contagion is 70% for cloth and surgical masks.
Editor: Luana Pavaluca
