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A distração das máscaras

Não há símbolo mais expressivo da pandemia de COVID-19 do que o uso generalizado de máscaras faciais. As pesquisas sobre o nível de obediência mostram que a população majoritariamente acatou os mandatos de uso de máscaras no Brasil e em outros países também (veja aqui, aqui, aqui e aqui). Algo que também pode ser verificado empiricamente por qualquer um que sair às ruas nos centros das cidades brasileiras. Tal nível de obediência ocorre, não obstante, o desencontro de informações acerca da necessidade de máscaras no início da pandemia, durante o qual diversas autoridades médicas vieram a público contraindicar o uso

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How is the frequency of E. coli mutants relevant to the economy?

A recently published paper entitled “Competition for nutritional resources masks the true frequency of bacterial mutants” describes the results of a research conducted by my group at the Laboratory of Bacterial Genetics about the curious phenomenon of hidden mutants in a bacterial population. We have been puzzled by the low frequency of mutants in the bacterial cultures and cracked our heads to understand the mystery. Eventually the riddle was solved and its solution was connected to competition, game theory and surprisingly to cooperation and production. First, a brief introduction about bacterial nutrition, genetics and evolution is required: Escherichia coli is

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Do facemasks limit the contamination/spread of respiratory viruses?

To limit the spread of respiratory diseases, facemasks can be used by: – healthy people, avoiding thus contamination by infected individuals – infected people, limiting the spread of viruses to susceptible individuals The use of masks is intuitively logical, as it provides a barrier, preventing the spread of droplets or aerosol containing viral particles. In fact, studies have shown that surgical masks or respirators are able to retain a large part of the viruses expelled by infected people. Under ideal conditions, which include the periodic replacement of surgical masks and receiving training for proper aseptic techniques, masks can be effective

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O que diz a ciência sobre o uso de máscaras faciais para limitar a propagação de viroses respiratórias

O que diz a ciência sobre o uso de máscaras faciais para limitar a propagação de viroses respiratórias

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