Candidate vaccine viruses and potency testing reagents for influenza A(H1N1)pdm09

The WHO Global Influenza Surveillance and Response System closely monitors the antigenic and genetic evolution of emerging and circulating human influenza viruses. Countries are encouraged to share with WHO both their specimens/isolates for inclusion in the WHO influenza vaccine virus selection and development process, and other activities of public health importance.

Institutions, companies and other parties interested in developing vaccines to the novel influenza A(H1N1)pdm09 virus are advised that the following candidate viruses are available.

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