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 were reported in 2021 and 2022. However, detections can result from use of quadrivalent live-attenuated vaccines. Of the type B viruses detected post-March 2020, all ascribed to a lineage have been B/Victoria-lineage. There is need for a global effort to detect and lineage-ascribe type B influenza viruses, to assess if B/Yamagata-lineage viruses have become extinct.
Has influenza B/Yamagata become extinct and what implications might this have for quadrivalent influenza vaccines? / Paget, J; Caini, S; Del Riccio, M; van Waarden, W; Meijer, A. - In: EUROSURVEILLANCE. - ISSN 1025-496X. - ELETTRONICO. - 27:(2022), pp. 0-0. [10.2807/1560-7917.ES.2022.27.39.2200753]
Has influenza B/Yamagata become extinct and what implications might this have for quadrivalent influenza vaccines?
Paget, J
;Caini, S;Del Riccio, M;
2022
Abstract
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 were reported in 2021 and 2022. However, detections can result from use of quadrivalent live-attenuated vaccines. Of the type B viruses detected post-March 2020, all ascribed to a lineage have been B/Victoria-lineage. There is need for a global effort to detect and lineage-ascribe type B influenza viruses, to assess if B/Yamagata-lineage viruses have become extinct.File | Dimensione | Formato | |
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