Due to the Evolving Nature of #influenza Viruses, Flu Vaccines Need to Be Updated ... - Latest Tweet by World Health Organization

Due to the evolving nature of #influenza viruses, flu vaccines need to be updated periodically.
Twice a year, WHO brings together experts to analyze influenza virus surveillance data generated by the Global Influenza Surveillance and Response System https://t.co/KkvAcRV8Qd pic.twitter.com/mYQXwLyeTM— World Health Organization (WHO) (@WHO) September 23, 2022

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