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Delta (B.617.2) First identified in India in late 2020, the delta variant soon spread across the globe. It became the dominant variant of SARS-CoV-2 until the emergence of omicron in December 2021.
In a study examining COVID-19 infections, hospitalizations, and deaths in Nebraska after vaccination with the 2023-2024 vaccines that targeted the XBB.1.5 variant, researchers found that vaccine ...
A study of samples collected in Manaus between November 2020 and January 2021, indicated that the Gamma variant is 1.4–2.2 times more transmissible and was shown to be capable of evading 25–61% of inherited immunity from previous coronavirus diseases, leading to the possibility of reinfection after recovery from an earlier COVID-19 ...
As respiratory virus season approaches in the U.S., some are concerned about whether XEC could cause a fall surge, and if the new COVID-19 vaccines being rolled out will protect against it.
False-colour transmission electron micrograph of a B.1.1.7 variant coronavirus. The variant's increased transmissibility is believed to be due to changes in the structure of the spike proteins, shown here in green. There are many thousands of variants of SARS-CoV-2, which can be grouped into the much larger clades. [142]
Epsilon variant, also known as CAL.20C and referring to two PANGO lineages B.1.427 and B.1.429, is one of the variants of SARS-CoV-2, the virus that causes COVID-19. It was first detected in California, USA in July 2020. [1] As of March 2022, Epsilon is considered as a previously circulating variant of interest by the WHO.
The new "FLiRT" COVID-19 variants, including KP.3 and KP.2, are spreading in the United States. Will there be a summer surge? Experts discuss transmission, symptoms, and vaccines.
Theta variant, also known as lineage P.3, [a] is one of the variants of SARS-CoV-2, the virus that causes COVID-19. The variant was first identified in the Philippines on February 18, 2021, when two mutations of concern were detected in Central Visayas . [ 1 ]