AY.12 variant of the SARS-CoV-2 that identified as a new sub-lineage of the Delta variant. Earlier, many of the Delta variant cases were reclassified as AY.12. The precise number of AY.12 variant cases is still inconclusive because of the inconsistency in the definition of AY.12.
The variants are created because of the changes made when the virus makes copies of itself. The Delta variant has created several sub-lineages called Delta Plus variants. One of these sub-lineages is the AY.12, which has all characteristics of Delta variant except one. AY.12 variant is currently a major concern for Andhra Pradesh.