Delta Sub-lineages AY.1, AY.2 Unlikely to Be More Transmissible Than Delta: Govt Panel

In a recent bulletin, it also said that AY.3 has been identified as a new sublineage of Delta and it is defined by 'ORF1a:I3731V common AY.1 mutations except for S:417'.

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In a recent bulletin, it also said that AY.3 has been identified as a new sublineage of Delta and it is defined by 'ORF1a:I3731V common AY.1 mutations except for S:417'.