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12 h, jan 10, 2020 y - WHO Guidelines: medical workers should wear masks, goggles, gowns.

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https://apps.who.int/iris/bitstream/handle/10665/330374/WHO-2019-nCoV-laboratory-2020.1-eng.pdf?sequence=1&isAllowed=y

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Nathan Rich: COVID-19 in the USA

ByNathan Rich
28 Apr 2022
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12 h, jan 10, 2020 y
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~ 5 years and 9 months ago
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