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Retrieved 24 May 2023. Most scientists studying the origins of COVID-19 have concluded that the SARS-CoV-2 virus probably evolved naturally and infected humans via incidental contact with a wild or domesticated animal. McCarthy S (16 September 2021). "Bat-human virus spillovers may be very common, study finds".
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]
The CDC publishes official numbers of COVID-19 cases in the United States. The CDC estimates that, between February 2020 and September 2021, only 1 in 1.3 COVID-19 deaths were attributed to COVID-19. [2] The true COVID-19 death toll in the United States would therefore be higher than official reports, as modeled by a paper published in The ...
The COVID‑19 vaccines are widely credited for their role in reducing the spread of COVID‑19 and reducing the severity and death caused by COVID‑19. [ 213 ] [ 219 ] According to a June 2022 study, COVID‑19 vaccines prevented an additional 14.4 to 19.8 million deaths in 185 countries and territories from 8 December 2020 to 8 December 2021 ...
t. e. Severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) [2] is a strain of coronavirus that causes COVID-19, the respiratory illness responsible for the COVID-19 pandemic. [3] The virus previously had the provisional name 2019 novel coronavirus (2019-nCoV), [4][5][6][7] and has also been called human coronavirus 2019 (HCoV-19 or ...
In California as of July 31, 37% of seniors had received the updated COVID-19 vaccine for the 2023–24 season, as did 18.7% of those age 50 to 64, and 10.1% of the youngest adults.
SARS-related coronavirus is a member of the genus Betacoronavirus (group 2) and monotypic of the subgenus Sarbecovirus (subgroup B). [13] Sarbecoviruses, unlike embecoviruses or alphacoronaviruses, have only one papain-like proteinase (PLpro) instead of two in the open reading frame ORF1ab. [14] SARSr-CoV was determined to be an early split-off ...
Transmission of COVID-19. The transmission of COVID-19 is the passing of coronavirus disease 2019 from person to person. COVID-19 is mainly transmitted when people breathe in air contaminated by droplets / aerosols and small airborne particles containing the virus. Infected people exhale those particles as they breathe, talk, cough, sneeze, or ...