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Results showed a median face mask effectiveness for PM2.5 equal to 48% in a range of 14–96%, 19% in a range of 6%–61% for BC concentration, 19% in a range of 4%–63% for PNC and 22% in a range of 5%–65% for LDSA. For each pollutant under investigation,...

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PM2.5 are fine particles, less than 2.5 micrometres in diameter. Normally, these smaller particles can penetrate in to the respiratory system and cause negative health effects. In fact, a majority of the overall particles were found to be in the small size range, which can …

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People wearing face masks stand in line to buy masks at a post office amid the rise in confirmed cases of coronavirus disease (COVID-19) in Daegu, South Korea, March 5, 2020. REUTERS/Kim Kyung-Hoon TOKYO (Reuters) – South Korea confirmed a total of 6,284 coronavirus cases on Friday, up by 196 cases from late Thursday.

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Mar 01, 2018 · Conclusions The masks, with or without features intended for enhancing comfort, provide protection against both small- and large-size pathogens. Importantly, the mask appears to be highly efficient for filtration of pathogens, including influenza and rhinoviruses, as well as the fine particulates (PM2.5) present in aerosols that represent a ...

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Taitung City Government held a series of 2020 Lantern Festival activities on February 1 of this year, most notably a press conference. It was attended by Mayor Guo-Chou Chang, Speaker Hsiu-Hua Wu, and people from all walks of life, such as Lord Handan, indigenous peoples, the Hakka, and of course local agricultural special products and lit-up sugar apple lanterns.

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