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Covid-19: No evidence to suggest AY.4 variant has higher infectivity rate than Delta, says scientist

Prime News, National (New Delhi), Oct 26:- There is no evidence to suggest that AY.4, a sub-lineage of the Delta variant of the coronavirus, has a higher infectivity rate than Delta, and it is not a new variant, Rakesh Mishra, former director of the Centre for Cellular and Molecular Biology (CCMB), said on Monday.

Six persons in Indore district of Madhya Pradesh were found infected with AY.4, Chief medical and Health Officer (CMHO) of the state BS Saitya said.

He said all the six, who were found to be infected with the AY.4 variant, were fully vaccinated. They have recovered after treatment, he added.

“There is no evidence or observation to suggest that there are more vaccine breakthrough or reinfections or more infectivity due to AY.4. At the moment, it does not look like it,” Mishra told PTI.

AY.4 is a sub-lineage of the Delta variant of the coronavirus, which was driving the deadly second wave of the infection that killed thousands from March to May.

“AY.4 is not a new variant,” Mishra, who headed the Hyderabad-based CCMB that is at the forefront of genome sequencing of the coronavirus, said. He is now the director of the Tata Institute for Genetics and Society in Bengaluru.

Mishra, however, stressed that observing Covid-appropriate behaviour is still very important as COVID-19 is yet to reach the pandemic stage.

Recent relative expansion of the AY.4 lineage, compared to B.1.617.2, in INSACOG data should be seen in the light of global evidence regarding no substantial difference between the Delta lineages so far, INSACOG, a genome-sequencing consortium, said in its October 4 bulletin. (MR, Inputs: Agencies).

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