Category

2021 disease outbreaks

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COVID-19 pandemic

pandemic caused by SARS-CoV-2 (2019–2023)

SARS-CoV-2 Delta variant

a subvariant of lineage B.1.617

SARS-CoV-2 Gamma variant

variant isolate of the SARS-CoV-2

2016-2020 Yemen cholera outbreak

outbreak of cholera in the war-torn country of Yemen