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Jul 19, 2022 · COVID-19: variants. Viruses, like SARS-CoV-2, change over time and will continue to change the more they circulate. Sometimes, variants of the virus may develop. A variant is where the virus contains at least one new change to the original virus. Some variants of the coronavirus, such as Delta and Omicron, are spreading more easily between people.
Dec 27, 2023 · For the past year, Covid-19 variants have circulated in a sort of alphabet soup. Right now, two variants, JN.1 and HV.1, comprise more than half of Covid cases in the United States.
On Nov. 26, the World Health Organization named the Omicron variant of the coronavirus a new variant of concern . The variant was first identified in South Africa and Botswana, and has been ...
The graphic and accompanying video detail the importance of sequencing the DNA of SARS-CoV-2, the virus that causes COVID-19. Genome sequencing enables researchers and public health authorities to identify and characterize emerging variants. Variant surveillance is important to determine if emerging mutations are rendering the virus more ...
Apr 8, 2022 · Variants of viruses occur when there is a change — or mutation — to the virus’s genes. Ray says it is the nature of RNA viruses such as the coronavirus to evolve and change gradually. “Geographic separation tends to result in genetically distinct variants,” he says. Mutations in viruses — including the coronavirus causing the COVID ...
Mar 15, 2024 · Headache. New loss of taste or smell. Sore throat. Congestion or runny nose. Nausea or vomiting. Diarrhea. This list does not include all possible symptoms. Symptoms may change with new COVID-19 variants and can vary by person. CDC will continue to update this list as we learn more about COVID-19.
Jun 14, 2022 · First identified in Botswana and South Africa in November 2021, the Omicron variant quickly surged to global dominance, faster than any previously known form of the coronavirus. Over the winter ...
