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Omicron Sibling BA.1 Quickly Replacing Delta Variant Across Country: INSACOG

BA.1 is dominantly co-circulating and quickly replacing the Delta variant in Maharashtra and other states.

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INSACOG (Indian SARS-CoV-2 Genomics Consortium) scientists working on genome sequencing of COVID-positive clinical samples have said that along with the original Omicron (B.1.1.529) variant, its sibling (sub-lineage) BA.1 is dominantly co-circulating and quickly replacing the Delta variant in Maharashtra and some other states of the country.

There are two more sub-lineages of the Omicron variant – BA.2 and BA.3.

A senior scientist was quoted as saying by The Times of India, “In some sequencing run of clinical samples, we got to see the presence of more BA.1 sub-lineage now than the original Omicron strain. Since the sub-lineage belongs to the same family, these samples are considered Omicron positive.”

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Meanwhile, a Union health ministry official said, "According to WHO, the BA.1 sub-lineage of Omicron accounts for 99 percent of sequences, and overall, over 95 percent of the Omicron variant sequences reported include a 69-70 deletion in the S gene in most countries reporting an Omicron-fuelled surge.”

India has so far confirmed 4,033 cases of the highly-transmissible Omicron variant in 27 states and Union Territories.

On Monday, 10 January, India reported 1,79,723 new COVID-19 cases and 146 deaths, as the country began administering the ‘precaution dose’ of COVID vaccine to frontline workers, healthcare workers, and senior citizens with comorbidities.

(With inputs from The Times of India.)

(At The Quint, we are answerable only to our audience. Play an active role in shaping our journalism by becoming a member. Because the truth is worth it.)

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Topics:  COVID-19   COVID   INSACOG 

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