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Sep 1, 2023 · It’s estimated that Delta caused more than twice as many infections as previous variants—in Connecticut, it was estimated to have been 80 to 90% more transmissible than the Alpha variant. In the U.S., in June 2021, after a steady decline in COVID-19 cases and hospitalizations, the arrival of Delta coincided with a rapid reversal of that trend.
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Nov 15, 2023 · The highly transmissible COVID-19 delta variant, also known as B1617.2, was found in India in October 2020. It was the dominant strain in the U.S. and several other countries during the fall of ...
Apr 8, 2022 · In November 2021, a variant of the SARS-CoV-2 coronavirus emerged and was named omicron by the WHO, which lists it as a variant of concern. Cases of the highly contagious variant, including a subvariant called BA.2, or “stealth omicron,” have caused surges of COVID-19, particularly in areas where safety precautions have been relaxed.
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).
Mar 13, 2021 · What is a COVID-19 variant strain? Matthew Binnicker, Ph.D., Director of the Clinical Virology Laboratory: Variant basically means a mutation that occurs in the virus over time. So just with natural evolution over time, as the virus infects people, it has the opportunity to replicate its genome, and every time it replicates its genome, there ...
Nov 4, 2023 · Concern over variants, sometimes called strains, of the virus that causes COVID-19 is based on how the virus might change. A virus could get better at infecting people, spread faster or cause people to get sicker. As a virus infects a group of people, the virus copies itself. During this process the genetic code can randomly change in each copy ...
Feb 5, 2021 · As of Feb. 4, according to U.S. figures continually updated by the CDC: A total 611 cases of COVID-19 caused by the B.1.1.7 variant have been reported among 33 states. For the B.1.351 variant ...
