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Coronavirus disease 2019 (COVID-19, also known as SARS-2) is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic. The symptoms of COVID‑19 can vary but often include fever, [7] fatigue, cough, breathing difficulties, loss of smell, and loss of taste.
direct care for a patient with probable or confirmed COVID-19 disease without using proper personal protective equipment; other situations as indicated by local risk assessments" The WHO recommends reporting probable and confirmed cases of COVID-19 infection within 48 hours of identification. [1]
COVID-19 symptoms range from asymptomatic to deadly, but most commonly include fever, sore throat, nocturnal cough, and fatigue. Transmission of the virus is often through airborne particles. Mutations have produced many strains (variants) with varying degrees of infectivity and virulence. [9]
A study of 236,379 COVID-19 survivors showed that the "estimated incidence of a neurological or psychiatric diagnosis in the following 6 months" after diagnosed infection was 33.62% with 12.84% "receiving their first such diagnosis" and higher risks being associated with COVID-19 severity.
[2] [17] There are animal-borne coronavirus strains more closely related to SARS-CoV-2, the most closely known relative being the BANAL-52 bat coronavirus. SARS-CoV-2 is of zoonotic origin; its close genetic similarity to bat coronaviruses suggests it emerged from such a bat-borne virus . [ 18 ]
The CDC says this could be a feature of COVID-19 infection, regardless of whether the person took Paxlovid, and that anyone who experiences a rebound of COVID-19 symptoms should follow the ...
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 .
The WHO warned of a potential "second wave" of COVID-19 infections in an update to its strategic advice to governments, as some European countries began to relax lockdown measures. [70] On 19 April, the Director-General of the WHO urged the G20 leading global economies to plan to ease lockdowns against COVID-19 only as part of "a phased process ...