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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 ...
e. 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 ...
The first case in India was reported on 30 January 2020. India ordered a nationwide lockdown starting 24 March 2020, [ 290 ] with a phased unlock beginning 1 June 2020. Six cities accounted for around half of reported cases— Mumbai , Delhi , Ahmedabad , Chennai , Pune and Kolkata . [ 291 ]
This is a timeline of HIV/AIDS, including but not limited to cases before 1980. Pre-1980s See also: Timeline of early HIV/AIDS cases Researchers estimate that some time in the early 20th century, a form of Simian immunodeficiency virus found in chimpanzees (SIVcpz) first entered humans in Central Africa and began circulating in Léopoldville (modern-day Kinshasa) by the 1920s. This gave rise ...
Index case. The index case or patient zero is the first documented patient in a disease epidemic within a population, [1] or the first documented patient included in an epidemiological study. [2] It can also refer to the first case of a condition or syndrome (not necessarily contagious) to be described in the medical literature, whether or not ...
"The precursor of the H5N1 influenza virus that spread to humans in 1997 was first detected in Guangdong, China, in 1996, when it caused a moderate number of deaths in geese and attracted very little attention." [9] In 1997, in Hong Kong, 18 humans were infected and 6 died in the first known case of H5N1 infecting humans. [10]
Birthday paradox: In a random group of only 23 people, there is a better than 50/50 chance two of them have the same birthday. Borel's paradox: Conditional probability density functions are not invariant under coordinate transformations. Boy or Girl paradox: A two-child family has at least one boy.
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 November 2024. Predicted dates of the end of the world This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. The Last Judgment by painter Hans Memling. In Christian belief, the Last Judgement is an ...