Influence of Nasopharyngeal Viral Load on the Spread of the Omicron BA.2 Variant

We used variant typing polymerase chain reaction to describe the evolution of severe acute respiratory syndrome coronavirus 2 Omicron sublineages between December 2021 and mid-March 2022. The selective advantage of the BA.2 variant over BA.1 is not due to greater nasopharyngeal viral loads.

Automated summary

Using variant typing polymerase chain reaction, this study describes the evolution of SARS-CoV-2 Omicron sublineages between December 2021 and mid-March 2022. The advantage of the BA.2 variant over BA.1 is not attributed to greater nasopharyngeal viral loads.