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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.
When COVID-19 reached the United States, the original required quarantine was 14 days of length, and later was shortened to 10 days, then 7 days, and eventually even 5 days in some places. Researchers have conducted studies using a variety of methods to analyze the statistical data behind the transmission risks.
The COVID-19 pandemic impacted Indigenous settlements (in the U.S.) particularly hard. A range of factors disproportionately impacted indigenous settlements perpetuating poverty, food insecurity, strain on community health, family strain, socioeconomic struggle, and poor physical as well as mental health status.
A COVID-19 vaccine is intended to provide acquired immunity against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), the virus that causes coronavirus disease 2019 . Prior to the COVID-19 pandemic, an established body of knowledge existed about the structure and function of coronaviruses causing diseases like severe acute ...
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]
The name "coronavirus" is derived from Latin corona, meaning "crown" or "wreath", itself a borrowing from Greek κορώνη korṓnē, "garland, wreath". [8] [9] The name was coined by June Almeida and David Tyrrell who first observed and studied human coronaviruses. [10]
On 19 June, the UN Secretary-General issued a new policy brief, the World of Work and COVID-19, concerning jobs, livelihoods and the well-being of workers, families and businesses globally, as they continued to be affected by the COVID-19 pandemic; with micro, small and medium enterprises in particular, suffering dire economic consequences. [46]
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]