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This article documents the chronology and epidemiology of SARS-CoV-2 in 2019, the virus that causes coronavirus disease 2019 ( COVID-19) and is responsible for the COVID-19 pandemic. The first human cases of COVID-19 known to have been identified were in Wuhan, Hubei, China, in December 2019. It marked the beginning of the 2019–2020 COVID-19 outbreak in mainland China .
The history of coronaviruses is an account of the discovery of the diseases caused by coronaviruses and the diseases they cause. It starts with the first report of a new type of upper-respiratory tract disease among chickens in North Dakota, U.S., in 1931. The causative agent was identified as a virus in 1933.
The CDC publishes official numbers of COVID-19 cases in the United States. The CDC estimates that, between February 2020 and September 2021, only 1 in 1.3 COVID-19 deaths were attributed to COVID-19. [2] The true COVID-19 death toll in the United States would therefore be higher than official reports, as modeled by a paper published in The ...
This article documents the chronology and epidemiology of SARS-CoV-2 in December 2020, the virus which causes the coronavirus disease 2019 ( COVID-19) and is responsible for the COVID-19 pandemic. The first human cases of COVID-19 were identified in Wuhan, China, in December 2019.
In December 2019, a pneumonia outbreak was reported in Wuhan, China. [119] On 31 December 2019, the outbreak was traced to a novel strain of coronavirus, [120] which was given the interim name 2019-nCoV by the World Health Organization, [121] [122] [123] later renamed SARS-CoV-2 by the International Committee on Taxonomy of Viruses .
Free Shipping Day is a one-day event held annually in mid-December. On the promotional holiday, consumers can shop from both large and small online merchants that offer free shipping with guaranteed delivery by Christmas Eve .