About The Article: This Perspective examines the currently circulating influenza A(H3N2) subclade K virus, including antigenic variants, vaccine effectiveness, and countermeasures.
Corresponding Author: To contact the corresponding author, Frederick G. Hayden, MD, email fgh@virginia.edu.
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(doi:10.1001/jama.2025.25903)
Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.
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Journal
JAMA