Agora fazem o favor de serem felizes em 2021 uns e os ignorantes calar a matraca sobre açaimes?
At present there is only limited and inconsistent scientific evidence to support the effectiveness of masking of healthy people in the community to prevent infection with respiratory viruses, including SARS-CoV-2 (75). A large randomized community-based trial in which 4862 healthy participants were divided into a group wearing medical/surgical masks and a control group found no difference in infection with SARS-CoV-2 (76). A recent systematic review found nine trials (of which eight were cluster-randomized controlled trials in which clusters of people, versus individuals, were randomized) comparing medical/surgical masks versus no masks to prevent the spread of viral respiratory illness. Two trials were with healthcare workers and seven in the community. The review concluded that wearing a mask may make little or no difference to the prevention of influenza-like illness (ILI) (RR 0.99, 95%CI 0.82 to 1.18) or laboratory confirmed illness (LCI) (RR 0.91, 95%CI 0.66-1.26) (44); the certainty of the evidence was low for ILI, moderate for LCI.
De forma absolutamente aberrante, perante a falta de prova a OMS presa em decisões políticas do passado e para não perder a face mantém recomendações que contemplam o uso!! A própria OMS reconhece a total contradição. Perante a falta de prova não oferecem sequer qualquer explicação racional para manter as recomendações, limitam-se tentar fazer a quadratura do círculo.
Despite the limited evidence of protective efficacy of mask wearing in community settings, i