Work

How Has the Disappearance of Influenza B/Yamagata Altered the Proportion of Influenza A and B Cases? Early Findings From Post‐COVID Pandemic Global Surveillance Data

Year: 2025

Type: article

Abstract: ABSTRACT We studied worldwide influenza surveillance data (2022–2024), particularly in 145 countries and 260 country‐seasons: influenza A represented 77.2% of identified cases, rising from 72.5% prepandemic, with A‐dominated seasons increasing from 84.6% to 92.3%. During the same period, B/Yamagata was not detected and uncharacterized B cases dropped from 21.0% to 7.5%, possibly reflecting improved surveillance efforts. These results highlight postpandemic changes in influenza circulation and have important implications for vaccine composition, virus monitoring, and global prevention strategies.

Source: Influenza and Other Respiratory Viruses

DOI: 10.1111/irv.70138

Authors: Marco Del Riccio, Jojanneke van Summeren, Saverio Caini, Koos van der Velden, Aura Timen

Institutions: University of Florence, Radboud University Nijmegen, Radboud University Medical Center

Language: English

Topic: Influenza Virus Research Studies

Subfield: Epidemiology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $4,840