Viral load of SARS-CoV-2 Omicron BA.5 is lower than that of BA.2 despite the higher infectivity of BA.5.
Yuna TakatsukiYuta TakahashiJun NakajimaYumi IwasakiKatsutoshi NaganoChihiro Tani-SassaSonoka YuasaSaki KanehiraKazunari SonobeYoko NukuiHiroaki TakeuchiKousuke TanimotoYukie TanakaAkinori KimuraNaoya IchimuraShuji TohdaPublished in: Immunity, inflammation and disease (2023)
The results presented here suggest that the increased infectivity of BA.5 is not caused by higher viral loads, but presumably by other factors such as increased affinity to human cell receptors or immune escape due to its L452R mutation.