{"id":7819,"date":"2020-04-01T02:45:15","date_gmt":"2020-04-01T05:45:15","guid":{"rendered":"https:\/\/tdibrasil.org\/?p=7819"},"modified":"2020-04-01T02:45:15","modified_gmt":"2020-04-01T05:45:15","slug":"a-propagacao-do-coronavirus-pelo-ar","status":"publish","type":"post","link":"https:\/\/tdibrasil.org\/index.php\/2020\/04\/01\/a-propagacao-do-coronavirus-pelo-ar\/","title":{"rendered":"A Propaga\u00e7\u00e3o do Coronav\u00edrus pelo Ar"},"content":{"rendered":"
\"\"
Cidade de Nova Iorque, novo epicentro da pandemia Covid-19 \/ pxfuel \u00a9<\/a><\/center><\/figcaption><\/figure>\n
\n

A velocidade de propaga\u00e7\u00e3o do novo coronav\u00edrus, Sars-CoV-2, e o alto poder de cont\u00e1gio obrigou na\u00e7\u00f5es ao isolamento de cidades e regi\u00f5es inteiras (lockdown) como tentativa desesperada de conter o avan\u00e7o da pandemia. Entretanto, em v\u00e1rios casos os n\u00fameros continuam a crescer ou apresentam pouca desacelera\u00e7\u00e3o. Descobrir o porqu\u00ea desse fen\u00f4meno pode ajudar a frear a propaga\u00e7\u00e3o da Covid-19.<\/p>\n

Trabalhos recentes demonstraram que exala\u00e7\u00f5es, espirros e tosse n\u00e3o consistem apenas em got\u00edculas maiores seguindo trajet\u00f3rias de curto alcance, mas s\u00e3o feitas principalmente de uma “nuvem de g\u00e1s agitado” que se combina ao ar ambiente, ret\u00e9m e transporta dentro dele aglomerados de pequenas got\u00edculas (aerossol). Deste modo o alcance da “nuvem de g\u00e1s” pode chegar a 8 metros<\/strong>. Essa \u00e9 mais ou menos a largura padr\u00e3o das novas ruas brasileiras, as vias antigas podem ser muito menores como as vielas que surgem com o crescimento desordenado das cidades.<\/p>\n

Sobre as recomenda\u00e7\u00f5es atuais e as restri\u00e7\u00f5es de distanciamento social, elas seriam necess\u00e1rias, mas ainda insuficientes para ambientes fechados. Portanto, \u00e9 recomendado uso de m\u00e1scaras<\/a> em ambientes com atendimento ao p\u00fablico nas regi\u00f5es onde h\u00e1 casos de infec\u00e7\u00e3o para mitigar a propaga\u00e7\u00e3o deste novo v\u00edrus. Al\u00e9m de todas as outras recomenda\u00e7\u00f5es (ver<\/a>).<\/p>\n

\n

1. James Rogers<\/strong>. Coronavirus droplets could travel 27 feet, warns MIT researcher<\/a>. March 31, 2020.<\/p>\n

2. Lydia Bourouiba<\/strong>. Turbulent Gas Clouds and Respiratory Pathogen Emissions: Potential Implications for Reducing Transmission of COVID-19<\/a>. March 26, 2020.<\/p>\n","protected":false},"excerpt":{"rendered":"

A velocidade de propaga\u00e7\u00e3o do novo coronav\u00edrus, Sars-CoV-2, e o alto poder de cont\u00e1gio obrigou na\u00e7\u00f5es ao isolamento de cidades e regi\u00f5es inteiras (lockdown) como […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":7820,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[54,231,237,713,780,843],"class_list":["post-7819","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geral","tag-aerossol","tag-coronavirus","tag-covid-19","tag-pandemia","tag-propagacao","tag-sars-cov-2"],"yoast_head":"\nA Propaga\u00e7\u00e3o do Coronav\u00edrus pelo Ar » Portal TDI Brasil +<\/title>\n<meta name=\"description\" content=\"A velocidade de propaga\u00e7\u00e3o do novo coronav\u00edrus, Sars-CoV-2, e o alto poder de cont\u00e1gio obrigou na\u00e7\u00f5es ao isolamento de cidades e regi\u00f5es inteiras\" \/>\n<meta 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