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  2. COVID-19 pandemic - Wikipedia

    en.wikipedia.org/wiki/COVID-19_pandemic

    The first known outbreak (the 2019–2020 COVID-19 outbreak in mainland China) started in Wuhan, Hubei, China, in December 2019. [32] Many early cases were linked to people who had visited the Huanan Seafood Wholesale Market there, [33] [34] [35] but it is possible that human-to-human transmission began earlier.

  3. Timeline of the COVID-19 pandemic - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_COVID-19...

    The timeline of the COVID-19 pandemic lists the articles containing the chronology and epidemiology of SARS-CoV-2, [1] the virus that causes the coronavirus disease 2019 and is responsible for the COVID-19 pandemic. The first human cases of COVID-19 occurred in Wuhan, People's Republic of China, on or about 17 November 2019. [2]

  4. COVID-19 - Wikipedia

    en.wikipedia.org/wiki/COVID-19

    Coronavirus disease 2019 (COVID-19) is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic . The symptoms of COVID‑19 can vary but often include fever, [ 7 ] fatigue, cough, breathing difficulties , loss of smell , and loss of taste .

  5. Origin of SARS-CoV-2 - Wikipedia

    en.wikipedia.org/wiki/Origin_of_SARS-CoV-2

    The FBI concluded with "moderate confidence" that COVID-19 may have been created in a laboratory, based in part on genomic analysis conducted by scientists at the National Center for Medical Intelligence. [98] On 20 March 2023, the COVID-19 Origin Act of 2023 was signed into law. On June 23, 2023, the Biden administration released its report ...

  6. Epidemic curve - Wikipedia

    en.wikipedia.org/wiki/Epidemic_curve

    Common source outbreak of Hepatitis A in Nov-Dec 1978. This epidemic curve shows a presumed first case, known as the index case on November 6, 1978. 4 days later, there was a steep increase in cases, followed by the curve tapering down to zero. Some cases were food handlers, and some secondary cases.

  7. Timeline of the COVID-19 pandemic in the United States (2021)

    en.wikipedia.org/wiki/Timeline_of_the_COVID-19...

    By March 5, more than 2,750 cases of COVID-19 variants were detected in 47 states; Washington, D.C.; and Puerto Rico. This number consisted of 2,672 cases of the B.1.1.7 variant, 68 cases of the B.1.351 variant, and 13 cases of the P.1 variant. [35]

  8. Timeline of the COVID-19 pandemic in the United States (2020)

    en.wikipedia.org/wiki/Timeline_of_the_COVID-19...

    As of February 23, fourteen COVID-19 cases had been diagnosed from six states: Arizona -1 case, California -8, Illinois -2, and Massachusetts, Washington, and Wisconsin, 1 case each). Twelve of the cases were related to travel to China, and two occurred through person-to-person transmission from close household contacts with confirmed COVID-19.

  9. Outline of the COVID-19 pandemic - Wikipedia

    en.wikipedia.org/wiki/Outline_of_the_COVID-19...

    Map of school closures around the world, red represents where schools were entirely closed at some point in the pandemic and orange where they were partially closed Social impact of the COVID-19 pandemic; COVID-19 pandemic baby bust; Impact of the COVID-19 pandemic on education; Human rights issues related to the COVID-19 pandemic

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