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Feb 6, 2023 · New variants of SARS-CoV-2, the virus that causes COVID-19, will continue to occur. CDC coordinates collaborative partnerships which continue to fuel the largest viral genomic sequencing effort to date. The Omicron variant, which emerged in November 2021, has many lineages.
- kathy.katella-cofrancesco@yale.edu
- Omicron and its subvariants. Omicron and its subvariants have ranked as the predominant SARS CoV-2 strains in the U.S for over a year now. The original Omicron strain (BA.1) was first identified in Botswana and South Africa in late November 2021, and cases quickly began to surface and multiply in other countries.
- Delta. Delta (B.1.617.2) was first identified in India in late 2020; it soon spread throughout the world, becoming what was the predominant version of the coronavirus—until Omicron took its place in mid-December.
- Delta AY.4.2* Delta AY.4.2, sometimes referred to—incorrectly—as Delta Plus, was actually the most prominent of a number of Delta offshoots, some of which had mutations new to Delta but that were found in other variants.
- Beta. This variant, or B.1.351, was identified in South Africa at the end of 2020 and spread to other countries. Experts had been concerned about its several mutations and its potential to evade antibodies.
Apr 26, 2022 · CDC’s national genomic surveillance program identifies new and emerging SARS-CoV-2 variants to determine implications for COVID-19 diagnostics, treatments, or vaccines approved or authorized for use in the United States. Sequences with similar genetic changes are grouped into lineages, and multiple lineages can have the same substitutions.
Aug 27, 2022 · Currently, the Centers for Disease Control and Prevention (CDC) has identified one variant of the virus (SARS-CoV-2) that causes coronavirus disease 2019 (COVID-19) as a variant of concern: Omicron. This variant spreads more easily than the original virus that causes COVID-19 and the delta variant.
Mar 2, 2022 · 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. We know we can protect from the virus and its new variants by: Getting vaccinated when it’s your turn Keeping a safe distance Opening windows when possible
Oct 25, 2022 · A Timeline of COVID-19 Variants Alpha (B.1.1.7). By the end of 2020, the original L strain had gone through multiple mutations, including the S, V, G... Beta (B.1.351). Shortly after Alpha was discovered, the Beta variant (B.1.351) was identified in South Africa and spread... Gamma (P.1). The Gamma ...
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COVID-19 pandemicPublic Health Emergency
The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). It was first identified in December 2019 in Wuhan, China. wikipedia.org
- Coronavirus disease 2019 (COVID-19)
- Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
- December 2019 - present
- Wuhan, Hubei, China
- Symptoms may appear 2-14 days after exposure to the virus. People with these symptoms may have COVID-19: Cough, shortness of breath or difficulty breathing, fever, chills, muscle pain, sore throat, new loss of taste or smell.
- The median incubation period for COVID-19 is four to five days. Most symptomatic people experience symptoms within two to seven days after exposure.
- Human-to-human transmission via respiratory droplets
- Avoiding close contact with sick individuals; frequently washing hands with soap and water; not touching the eyes, nose, or mouth with unwashed hands; and practicing good respiratory hygiene
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