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  2. Symptoms of COVID-19 - Wikipedia

    en.wikipedia.org/wiki/Symptoms_of_COVID-19

    Symptoms of COVID-19. Some less common symptoms of COVID-19 can be relatively non-specific; however the most common symptoms are fever, dry cough, and loss of taste and smell. [1] [22] Among those who develop symptoms, approximately one in five may become more seriously ill and have difficulty in breathing.

  3. Timeline of the COVID-19 pandemic in 2019 - Wikipedia

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

    On 23 May 2021, The Wall Street Journal reported that newly disclosed U.S. intelligence obtained that three researchers working at the BSL-4 laboratory of the Wuhan Institute of Virology were hospitalized with COVID-like symptoms. The report added weight to calls for a broader probe into the theory that the COVID-19 virus could have escaped ...

  4. COVID-19 surveillance - Wikipedia

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

    COVID-19 surveillance involves monitoring the spread of the coronavirus disease in order to establish the patterns of disease progression. The World Health Organization (WHO) recommends active surveillance , with focus of case finding, testing and contact tracing in all transmission scenarios. [ 1 ]

  5. 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]

  6. Timeline of the COVID-19 pandemic in January 2020 - Wikipedia

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

    Based on the patient's travel history and symptoms, healthcare professionals suspected this new coronavirus. A clinical specimen was collected and sent to CDC overnight, where laboratory testing yesterday confirmed the diagnosis via CDC's Real-time Reverse Transcription-Polymerase Chain Reaction (rRT-PCR) test."

  7. History of coronavirus - Wikipedia

    en.wikipedia.org/wiki/History_of_coronavirus

    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 the U.S. state of North Dakota, in 1931. The causative agent was identified as a virus in 1933.

  8. SARS-CoV-2 Delta variant - Wikipedia

    en.wikipedia.org/wiki/SARS-CoV-2_Delta_variant

    The Delta variant (B.1.617.2) was [3] [4] a variant of SARS-CoV-2, the virus that causes COVID-19. It was first detected in India on 5 October 2020. It was first detected in India on 5 October 2020. The Delta variant was named on 31 May 2021 and had spread to over 179 countries by 22 November 2021.

  9. Zoe Health Study - Wikipedia

    en.wikipedia.org/wiki/Zoe_Health_Study

    Beginning in May 2020, a random sample of users is selected (on the first day they report symptoms) for a swab test. [9] Researchers then use statistical analysis to determine which symptoms are likely to indicate COVID-19, [17] rather than the common cold or seasonal influenza. [2] The app does not have any contact tracing functionality. [5]