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17 samples of Omicron offshoot CH.1.1 with Delta mutation detected in India

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eMediNexus    10 December 2022

International experts are concerned about a recently discovered Omicron offshoot CH.1.1 that has appeared in India, notably Maharashtra. According to the most recent INSACOG data, this subvariant was found in 17 samples in India. Of these, one was from Gujarat and a total of 16 were from Maharashtra.

 

Scientists worldwide are more concerned because CH.1.1 has a Delta mutation, which could make it more pathogenic. Dr. Sanjay Pujari, a national Covid task group member, said that one mutation R, which has been linked to increased cell fusion and toxicity in animal models, is anticipated to account for the severe disease linked to the Delta variant that hass been found in CH.1.1 sequences. He added that the Delta wave occurred when the immunity wall was insufficient and more data was necessary before any increased pathogenicity property could be linked to the CH.1.1.

 

International researchers who regularly monitor SARS-CoV-2 changes stated that one of the most immune-evasive variations, CH.1.1, has just been found to carry the Deltas R mutation in specific samples abroad. The major mutations that distinguish CH.1.1 from BQ.1.1, a more pathogenic offspring of BA.5, were separately acquired by both species. The mild Omicron subvariant BA.2, which intrigues experts worldwide, is an ancestor of CH.1.1.

 

A senior INSACOG official claimed that when Delta appeared in 2020–2021 with its major mutations, the Indian community was not immunogenically ready for it. People now have developed immunity against new SARS-Cov-2 subvariants through exposure and immunization, depending on which sub- lineages predominate in which regions.

 

He said that as instances have been declining nationwide, including in Maharashtra, India currently has nothing to worry. A close eye is being kept on the Covid spread, and the current situation does not indicate greater transmission.

 

(Source: https://health.economictimes.indiatimes.com/news/industry/omicron-offshoot-ch-1-1-with-delta-mutation-found-in-india/96122555)

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