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

Descripción:

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

Añadido al timeline:

Nathan Rich: COVID-19 in the USA

28 abr 2022

20

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23651

fecha:

12 h 10 ene 2020 año

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