In Luxembourg, where  about 52% of the positive samples are sequenced, 2850 Delta cases have been identified by the Microbiology Department at the Laboratoire national de santé, as of 13 September 2021. The parental lineage B.1.617.2 remains de predominant (72,1%), followed by AY.5 (12,4%) and AY.4 (5,2%), while the remaining sublineages account individually for less than 5% of all Delta cases in the country. The appearance of AY sublineages raised questions, as whether these are new variants and what their impact might be. This scientific briefing aims to address these and other concerns regarding the Delta variant and its sublineages.

Discover the scientific note written by the experts of the LNS microbiology department on this subject by downloading it: https://lns.lu/publication/scientific-briefing-delta-variant-b-1-617-2-lineage-and-ay-sublineages/