5 Octobre 2023
While two influenza B virus lineages have co-circulated, B/Yamagata-lineage circulation has not been confirmed since March 2020. The WHO FluNet database indicates that B/Yamagata-lineage detections
https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2022.27.39.2200753?s=09