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A coronavirus named SARS-CoV-2 causes COVID-19, while an influenza viruses is the source of flu. Flu and COVID-19 have some of the same symptoms, making it difficult to differentiate between the ...
Symptoms of COVID-19. Some less common symptoms of COVID-19 can be relatively non-specific; however the most common symptoms are fever, dry cough, and loss of taste and smell. [1] [22] Among those who develop symptoms, approximately one in five may become more seriously ill and have difficulty in breathing.
Coronavirus disease 2019 (COVID-19) is a contagious disease caused by the coronavirus SARS-CoV-2.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.
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 ...
With a severe case of COVID-19, a person may experience weakness, lethargy, and fever for a prolonged period of time. However, in some cases, a person might not even show symptoms of having the ...
This article documents the chronology and epidemiology of SARS-CoV-2 in 2019, the virus that causes coronavirus disease 2019 and is responsible for the COVID-19 pandemic. The first human cases of COVID-19 known to have been identified were in Wuhan , Hubei , China , in December 2019.
The symptoms of HV.1 and other COVID-19 variants can look very similar to other viruses, including respiratory syncytial virus (RSV), influenza and rhinovirus, which usually causes the common cold.
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.