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This article documents the chronology and epidemiology of SARS-CoV-2 in 2019, the virus that causes coronavirus disease 2019 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.
The first human cases of COVID-19 occurred in Wuhan, People's Republic of China, on or about 17 November 2019. [2] The first confirmed human case in the United States was on 19 January 2020. The World Health Organization declared the COVID-19 outbreak a Public Health Emergency of International Concern (PHEIC) on 30 January 2020, and first ...
[86] [87] Marion Koopmans, a member of the WHO study team, described the number of flu-like illnesses at the WIV in 2019 as "completely normal". [88] Workers at the WIV must provide yearly serum samples. [3] [88] WIV virologist Shi Zhengli said in 2020 that, based on an evaluation of those serum samples, all staff tested negative for COVID-19 ...
More than a year after the outbreak of the coronavirus pandemic in Wuhan, China, the origins of SARS-CoV-2, the virus that causes COVID-19, remains a mystery. So far, scientists have not been able ...
As the U.S. marks one year since its first case, questions remain about the origin of the coronavirus that causes the disease. The answers matter.
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SARS-CoV-2 is the seventh known coronavirus to infect people, after 229E, NL63, OC43, HKU1, MERS-CoV, and the original SARS-CoV. [105] Like the SARS-related coronavirus implicated in the 2003 SARS outbreak, SARS‑CoV‑2 is a member of the subgenus Sarbecovirus (beta-CoV lineage B). [106] [107] Coronaviruses undergo frequent recombination. [108]
COVID-19 is the deadliest pandemic in US history; [360] it was the third-leading cause of death in the US in 2020, behind heart disease and cancer. [361] From 2019 to 2020, US life expectancy dropped by 3 years for Hispanic Americans, 2.9 years for African Americans, and 1.2 years for white Americans. [362]