Neurovirulence of type 1 polioviruses isolated from sewage in Japan

Hitoshi Horie1, Hiromu Yoshida, Kumiko Matsuura

  • 1Japan Poliomyelitis Research Institute, Kumegawa 5-34-4, Higashimurayama, Tokyo 189-0003, Japan. jpri@technowave.ne.jp

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