Defective viral genomes point to an evolution of viral fitness in SARS-CoV-2 mild infections
S gene sequencing of Omicron BA.1, BA.1.1, BA.2, BA.2.86, BA.5, BQ.1.1 and XBB.1.5 subvariants with Next Generation Sequencing (NGS) (Miseq, Illumina platform).