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SARS-CoV-2 is the virus that causes coronavirus disease 2019 (COVID-19). Some have been stated, to be of particular importance due to their potential for increased transmissibility, [1] increased virulence, or reduced effectiveness of vaccines against them. [2] [3] These variants contribute to the continuation of the COVID-19 pandemic.
A strain is a variant with enough mutations to dramatically change its characteristics compared to the parent virus. ... Although the basic symptoms of COVID-19, such as fever, chills, and fatigue ...
Omicron constitutes the current strain of COVID-19 in circulation. “Omicron is very contagious. That was how it out-competed the Delta variant,” Dr. Yancey says.
This article aims at keeping an up-to-date list of Coronavirus strains and subspecies successfully isolated and cultured in laboratory, a task which is often challenging. When relevant it shall include a few synthetic chimera as well as some strains that were only propagated in laboratory animals.
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.
Here's what you need to know about the most common COVID-19 variant, and the latest one to cause infections. ... The CDC's Nowcast data tracker shows the following strains are in the top 10 of ...
Infectious bronchitis virus is one of a number of strains of the species Avian coronavirus. [133] Another strain of avian coronavirus is turkey coronavirus (TCV) which causes enteritis in turkeys. [127] Coronaviruses also affect other branches of animal husbandry such as pig farming and cattle raising. [127]
Virus experts say it’s unclear if new strains pose any concern for vaccines or cause more severe disease.