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Variants of severe acute respiratory syndrome coronavirus 2 ( SARS-CoV-2) are viruses that, while similar to the original, have genetic changes that are of enough significance to lead virologists to label them separately. SARS-CoV-2 is the virus that causes coronavirus disease 2019 (COVID-19).
- SARS-CoV-2 Omicron variant
Omicron (B.1.1.529) is a variant of SARS-CoV-2 first...
- SARS-CoV-2 Delta variant
The Delta variant (B.1.617.2) was a variant of SARS-CoV-2,...
- SARS-CoV-2 Omicron variant
May 3, 2024 · Since 2020, SARS-CoV-2, the virus that causes COVID-19, has been spreading and changing globally. These changes have led to the detection of variants in many countries around the world. The more significant of these variants are grouped in three different ways – variants under monitoring, variants of interest and variants of concern.
CDC uses viral genomic surveillance to quickly identify and track COVID-19 variants, and acts upon these findings to protect the public’s health. Some variants spread more easily and quickly than others, which may lead to more cases of COVID-19. For the most up to date information about current variants, visit CDC’s COVID Data Tracker.
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 contagious, more potent, or resistant to existing vaccines and medicines.
Mar 24, 2021 · Across the world, there are multiple variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes coronavirus disease 2019 (Covid-19). SARS-CoV-2 variants...
