Confirmation of an AY.4/BA.1 recombinant first detected in France

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First solid evidence for a Delta-Omicron recombinant virus has been shared by Institut Pasteur via GISAID (EPI_ISL_10819657 incl. raw reads). The analysis provides definite confirmation of the structure of a recombinant virus derived from the GK/AY.4 and GRA/BA.1 lineages.

This recombinant virus identified in several regions of France by the EMERGEN consortium has been circulating since early January 2022 and genomes with a similar profile have been also identified in Denmark and The Netherlands. Further investigations are needed to determine if these recombinants derive from a single common ancestor or could result from multiple similar recombination events.

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Dr Akshay Minhas

MD (Community Medicine) PGDGARD (GIS) Assistant Professor Dr. Rajendra Prasad Government Medical College (DR.RPGMC), Tanda Kangra, Himachal Pradesh, India

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