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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.
XEC has also been reported in at least 25 U.S. states though there could be more as genetic testing is not done on every positive test, RTI International epidemiologist Joëlla W. Adams said.
A new COVID-19 variant, HV.1, is now the dominant strain in the U.S. Here's what to know about HV.1 symptoms, transmission, and how it affects the new booster.
The Gamma variant or lineage P.1, termed Variant of Concern 21JAN-02 [30] (formerly VOC-202101/02) by Public Health England, [30] 20J (V3) [75] or 20J/501Y.V3 [98] by Nextstrain, or just 501Y.V3, [101] was detected in Tokyo on 6 January 2021 by the National Institute of Infectious Diseases (NIID). It has been labelled as Gamma variant by WHO.
With the Omicron variant, as of 2022, reinfections have become common, albeit it is unclear how common. [342] COVID-19 reinfections are thought to likely be less severe than primary infections, especially if one was previously infected by the same variant. [342] [additional citation(s) needed]
The Lambda variant, also known as lineage C.37, is a variant of SARS-CoV-2, the virus that causes COVID-19. [1] It was first detected in Peru in August 2020. [ 2 ] On 14 June 2021, the World Health Organization (WHO) named it Lambda variant [ 1 ] and designated it as a variant of interest . [ 3 ]
When an infected person speaks, coughs or sneezes, they send infectious particles and droplets of respiratory fluid into the air, according to the United States Environmental Protection Agency.
In a diagnostic test, sensitivity is a measure of how well a test can identify true positives and specificity is a measure of how well a test can identify true negatives. For all testing, both diagnostic and screening, there is usually a trade-off between sensitivity and specificity, such that higher sensitivities will mean lower specificities ...