The benefits of using a double chinstrap against Covid-19, the new US recommendation

A mask protects, two do a better job. This is the result of a survey published this Wednesday by the Centers for Disaster Control and Prevention (CDC) from the United States, which first recommended using double protection to “significantly” prevent the spread of the coronavirus.

I agree with you CDC, placing a cloth mask over a surgical-type mask, like disposable bruises, can block the leakage of 92.5% of potentially infectious particles.

“In the study, we found that wearing any type of mask worked much better than not wearing a mask. And properly fitted masks provided the best performance in both blocking emitted aerosols and exposing aerosols, ”said the CDC director, Rochelle Walensky.

“We continue to recommend that the masks have two or more layers, they completely cover the nose and mouth and fit snugly over the nose and sides of the face, ”Walensky said. However, the expert clarified that the experiments carried out only used a fabric mask over a surgical mask, so modifications with other types of face protection are not recommended.

“I would like to point out that these new scientific data published today specific recommendations on who should wear a mask or when not to change you must use one. But they are providing new insight into why wearing a properly fitted mask is so important to protect yourself and others, ”Walensky said.

Although this is the first CDC-backed research to recommend the use of a double mask, leading US infectious disease expert Anthony Fauci previously suggested its use. “There is nothing wrong with people wearing two masks. I often wear two masks myself “Said Fauci.

Medical authorities in several countries had previously recommended the use of two masks or more effective masks, such as N95, FFP2 or KN95, in the face of the new, more contagious variants of the coronavirus.

During the study carried out at the end of January, the CDC They tried two modificationsSimple tips to improve the performance of the most commonly used masks:

The two methods produced significantly better protection against transmission and exposure to infectious aerosols, according to CDC data. The study found that “knotting” (tying the rubber bands close to the fabric before placing them in our ears) can also improve the overall performance of the masks.

This procedure, according to the researchers, reduces particle leakage on both sides of the face, so that the possibility of infections is also lower. According to the CDC’s Morbidity and Mortality Weekly Report, a knotted mask can block the escape of 63% of particles that could contain the coronavirus, while protection is reduced to 42% of particles when they are not tied.

Based on the new evidence from the study, The CDC further recommended:

BBC Mundo