"An instance of sequential infection of an individual with, firstly, the Delta variant and secondly a Delta-sub-lineage has been identified. The individual was found positive for the AY.26 lineage 22 days after being found positive for the Delta [B.1.617.2] variant...Nucleic acid extractions were performed by Apostle MagTouch Nucleic Acid Extraction Automation Systems [Apostle Inc, San Jose, CA]. "