Eficácia média da máscara de tecido é de 40%, diz estudo da USP

[{"selector":"#anim-13d0772e-3551-48de-a394-eda971c4752c [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-15.393074758695741%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":3500,"fill":"both"}] EFICÁCIA DAS MÁSCARAS CONTRA A COVID-19 Pexels Estudo da USP comparou o nível de proteção das máscaras de tecido, TNT e as PFF2

[{"selector":"#anim-49d7e407-4438-4700-bb1b-a606ced37124","keyframes":[{"transform":"rotate(-540deg) scale(0.1)","opacity":0},{"transform":"none","opacity":1}],"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both","iterations":1}] [{"selector":"#anim-e93edaa6-e446-4301-84a8-c8018b946055 [data-leaf-element=\"true\"]","keyframes":{"transform":["scale(3.6036036036036037)","scale(1)"]},"delay":0,"duration":2500,"fill":"forwards"}] Um novo estudo da USP testou o grau de eficácia de máscaras de diferentes materiais contra o novo coronavírus Unsplash

[{"selector":"#anim-02219a21-baf6-4ea3-8448-e603dd9f0caa","keyframes":{"transform":["translate3d(115.96638%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":300,"duration":1000,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e4733f8d-88fe-41df-8865-4db28ecc4a18","keyframes":{"opacity":[0,1]},"delay":300,"duration":1000,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-fd7ab178-51d1-479a-ad54-c42d6c574d13","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":300,"duration":1000,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-d1eb2848-aff0-4240-9e36-c952254f32db [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-15.763604500461307%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":3000,"fill":"both"}] Todas elas passaram por um equipamento que produz partículas de aerossol de tamanho controlado, equivalente ao tamanho do vírus da Covid-19 Unsplash

[{"selector":"#anim-df6cc554-26c5-4b43-902d-234b6a7b2308","keyframes":{"transform":["translate3d(0px, -137.21833%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f2942ef1-3960-440d-bd0c-1b91564cc0b4","keyframes":{"transform":["translate3d(0px, -150.60694%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-86bc17b9-280f-4600-84e9-ae8c17f039d8","keyframes":{"transform":["translate3d(0px, -137.65431%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Após o jato, os pesquisadores mediram a concentração de partículas da máscara para chegar a uma média de proteção Tenor

[{"selector":"#anim-8c0f7ad0-ab18-46a4-9ed6-dcb1a6f18b33","keyframes":{"transform":["translate3d(112.54237%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":200,"duration":1300,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-56537ccf-649f-48f3-ad27-f5c0e07cbb40","keyframes":{"opacity":[0,1]},"delay":200,"duration":1300,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-a7e9ce59-17aa-4f14-b6c3-22f5889884c1","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":200,"duration":1300,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-0ccfe422-33b7-4171-b9f5-66ad78dc0e78 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(32.04968404314868%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":4500,"fill":"both"}] Os modelos que se mostraram mais eficazes foram as máscaras cirúrgicas e as do tipo PFF2 e N95 , que conseguiram filtrar entre 90% e 98% das partículas Pexels

[{"selector":"#anim-123c52b3-b87d-4998-be29-5abd20b81f6b","keyframes":{"transform":["translate3d(-111.58941%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":200,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-90c7f07b-b808-4fdd-a972-fd48de56a683","keyframes":[{"transform":"rotateZ(-360deg)"},{"transform":"rotateZ(0deg)"}],"delay":200,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-e64e188e-d0e2-4c14-98ef-ab0d1bd18bc0 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(17.634133821429142%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":4000,"fill":"both"}] Na sequência, estão as de TNT (feitas de polipropileno, um tipo de plástico), cuja proteção variou de 80% a 90% Pexels

[{"selector":"#anim-660677c6-98bc-4144-84e2-3b8be3db748f","keyframes":{"transform":["translate3d(-75.06427%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-619d35bd-7561-485d-a286-5f3f288c37d0","keyframes":{"transform":["translate3d(-14899.90524%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0b642bb0-7f08-494c-9685-bd32cb0985aa","keyframes":{"transform":["translate3d(-112.69231%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d9dc9306-7eec-443a-8876-8fa8f9150106","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":2000,"fill":"forwards"}] Unsplash Por último vieram as de tecido , grupo que inclui máscaras feitas de algodão ou materiais sintéticos, como lycra e microfibra

[{"selector":"#anim-75878e18-279f-4082-bec9-18eeca27d7f3","keyframes":{"transform":["translate3d(0px, 281.08566%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-09cd6635-9fc8-4173-bfac-b07325d5c359 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-58.42244469793796%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":4500,"fill":"both"}] A eficiência de filtração desses modelos variou entre 15% e 70% , com média de 40%, constatou o estudo Giphy

[{"selector":"#anim-db39a46d-7f28-4942-af56-ecf13e5816a0","keyframes":{"transform":["translate3d(0px, -125.82246%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1f6a27cf-8dbe-4d91-8643-a125d81dfd98","keyframes":{"transform":["translate3d(0px, -128.2768%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-dc7fdf6d-f74c-4503-a5a3-fb1194da440b","keyframes":{"transform":["translate3d(0px, -125.679%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-5b06b801-cf76-4f8c-a01d-c012ac566930","keyframes":{"transform":["translate3d(126.86568%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e109c6e5-f825-48b7-a96c-34fe87cf00fa","keyframes":[{"transform":"rotateZ(360deg)"},{"transform":"rotateZ(0deg)"}],"delay":0,"duration":1300,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] Atualmente, autoridades sanitárias têm recomendado que pessoas comuns usem máscaras duplas - uma de tecido em cima de um modelo cirúrgico - para maior proteção, caso não tenham acesso a uma N95 ou PFF2 Giphy Leia mais notícias no site da CNN Brasil