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A term for COVID-19 used by former United States president Donald Trump to emphasize that the pandemic started in China. Comirnaty. Main article: Comirnaty. The commercial name for the FDA approved COVID-19 vaccine from Pfizer, released August 21, 2021. It also has several other names or designators used on the actual vials. Community transmission
The earliest reports of a coronavirus infection in animals occurred in the late 1920s, when an acute respiratory infection of domesticated chickens emerged in North America. [15] Arthur Schalk and M.C. Hawn in 1931 made the first detailed report which described a new respiratory infection of chickens in North Dakota.
Initial estimates of the basic reproduction number (R 0) for COVID-19 in January 2020 were between 1.4 and 2.5, [58] but a subsequent analysis claimed that it may be about 5.7 (with a 95 per cent confidence interval of 3.8 to 8.9). [59] In December 2021, the number of cases continued to climb due to several factors, including new COVID-19 variants.
Epidemiological studies estimate that in the period between December 2019 and September 2020 each infection resulted in an average of 2.4–3.4 new infections when no members of the community were immune and no preventive measures were taken. [21] However, some subsequent variants have become more infectious. [22]
On 11 February 2020, the WHO named the disease COVID-19 (short for coronavirus disease 2019). That same day, the International Committee on Taxonomy of Viruses (ICTV) formally announced it had named the causative virus as SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) based upon its genetic similarity to the 2003 SARS-CoV.
Coronavirus diseases are caused by viruses in the coronavirus subfamily, a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, the group of viruses cause respiratory tract infections that can range from mild to lethal.
Coronavirus may also refer to: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), a strain that emerged in 2019 Coronavirus disease 2019 (COVID-19), the disease it causes; COVID-19 pandemic, the global spread of that disease; Coronavirus, a 2020 Indian drama film by Agasthya Manju
The 2020 Singapore circuit breaker measures is an example of a lockdown due to COVID-19. [38] [39] On 12 June 2020, the US Centers for Disease Control and Prevention reported that 79.5% of US adults surveyed during May 5–12 supported stay-at-home orders and nonessential business closures as government-mandated COVID-19 mitigation strategies. [40]