La COVID-19 est une maladie causรฉe par un coronavirus appelรฉ SARS-CoV-2. Lโ€™OMS a appris lโ€™existence de ce nouveau virus pour la premiรจre fois le 31 dรฉcembre 2019, lorsquโ€™un foyer. Mar 28, 2023ย ยท COVID-19 is the disease caused by a coronavirus called SARS-CoV-2. WHO first learned of this new virus on 31 December 2019, following a report of a cluster of cases of so-called.

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