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SARS-CoV-2, the causative agent of COVID-19, was first introduced to humans through zoonosis (transmission of a pathogen to a human from an animal), and a zoonotic spillover event is the origin of SARS-CoV-2 that is considered most plausible by the scientific community.
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.
Characteristics of zoonotic coronavirus strains MERS-CoV, SARS-CoV, SARS-CoV-2, and related diseases MERS-CoV SARS-CoV SARS-CoV-2; Disease: MERS: SARS: COVID-19: Outbreaks: 2012: 2002–2004: 2019−present: Epidemiology Date of first identified case: June 2012: November 2002: December 2019 [99] Location of first identified case: Jeddah, Saudi ...
Zero-COVID. Main article: Zero-COVID. A suppression strategy that involves using public health measures such as contact tracing, mass testing, and border quarantine and lockdowns Zoonotic. Main article: Zoonotic. A term used to describe a disease originating in animals that has mutated to infect humans. Zoom. Main article: Zoom (software)
SARS-CoV-2 is the seventh known coronavirus to infect people, after 229E, NL63, OC43, HKU1, MERS-CoV, and the original SARS-CoV. [105] Like the SARS-related coronavirus implicated in the 2003 SARS outbreak, SARS‑CoV‑2 is a member of the subgenus Sarbecovirus (beta-CoV lineage B). [106] [107] Coronaviruses undergo frequent recombination. [108]
“A brief return of symptoms may be part of the natural history of SARS-CoV-2 (the virus that causes COVID-19) infection in some persons, independent of treatment with Paxlovid and regardless of ...
In February 2021, after conducting part of their study, the WHO stated that the likely origin of COVID-19 was a zoonotic event from a virus circulating in bats, likely through another animal carrier, and that the time of transmission to humans was likely towards the end of 2019. [59]
The most recent COVID-19 vaccine should offer protection against the XEC variant, Russo says. “The most recent version of the vaccine seems to be reasonably well-matched,” he says.