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Potency of a vaccine prepared from A/swine/Hokkaido/2/1981 (H1N1) against A/Narita/1/2009 (H1N1) pandemic influenza virus strain

Masatoshi Okamatsu, Yoshihiro Sakoda, Takahiro Hiono, Naoki Yamamoto and Hiroshi Kida*

Virology Journal 2013, 10:47  doi:10.1186/1743-422X-10-47

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