The Federal District government does not intend to resume the mandatory use of the mask. For a while, at least.
Discover the effectiveness of the main models of masks against Covid
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Despite the relaxation of the rules for the use of masks and the decrease in Covid cases recorded in Brazil, it is not yet time to abandon care to contain the virus, especially with so many variables in the circulation.Kelito Chan / Getty Images
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According to a study released in December 2021 by the Max Planck Institute in Germany, the mask acts as a shield against the Covid virus and helps contain outbreaks of other viruses that may have pandemic potential, such as H3N2.RUNSTUDIO / Getty Images
According to the scientific journal Proceedings of the National Academy of Sciences (PNAS), when an infected person uses a mask like PFF2 and a healthy person close to them also uses PFF2, the chance of infection is only 0.1%. However, not all protective masks are equally effective.Boy_Anupong / Getty Images
According to researchers from the University of São Paulo (USP), who evaluated 227 different masks and published their study in the journal Aerosol Science and Technology, PFF2 filtration (also known as N95) prevents the passage of 98% of particles from 60 to 300 no. Therefore, PFF2 is the most suitable protective maskDon McKinnon / Getty Images
Also according to the study, which analyzed the ability of accessories to prevent inhalation or expel the virus, surgical masks came in second in terms of protection. This is because they have an 89% filtration capacity.Kelito Chan / Getty Images
Slightly stronger than a surgical mask, PFF1 is lined with a filter that repels microorganisms. However, the cost benefit of the product may not be interesting, as it is disposable and the price is not the cheapest.Grace Carey / Getty Images
However, popular cotton masks have been shown to be less effective against particle retention, around 20% and 60%. This is because the fabric used to make the piece leaves more space between the threads and reduces protection against the virus.Ganlaya Tegum/Em/Getty Images
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However, according to researchers, despite the effectiveness of masks, they will be useless if they are not used correctly. Adjusting the mask to the face, avoiding gaps in the attachment of the attachment to the nose, chin, and cheeks, and making changes to the piece during the day is essential to ensure protection from Covid and any other viruses.hiphotos35 / Getty Images
The transmission rate of the Covid virus is 1.46. It is considered high by the World Health Organization (WHO). However, Ibanes said on Twitter that the decision to make the mask mandatory should take into account other indicators, such as “infection, hospitalization and mortality.” “At the moment, this measure is not necessary,” he said.
Publications circulating on social media of a post reporting the signature of a decree forcing residents to use the safety component are fake.