There have been cases when genomic analysis was performed during the two infections and it "showed genetically significant differences between each variant asso

There have been cases when genomic analysis was performed during the two infections and it "showed genetically significant differences between each variant associated with each instance of infection". So reinfection actually is possible. https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(20)30764-7/fulltext https://www.thelancet.com/journals/laninf/article/PIIS1473-3...