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31 déc. 2019 - Chinese authorities treat dozens of cases of pneumonia from an unknown cause.

Description:

On December 31st, 2019 government officials in Wuhan, China confirm that they are treating dozens of people with an illness of an unknown cause. At the same time, a new virus had infected dozens in Asia however there was not evidence of human transmission.

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Date:

31 déc. 2019
Maintenaint
~ Il y a 5 ans et 9 mois