Definition of Brunhilde virus

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Brunhilde virus: Type 1 poliovirus. Named after a female chimpanzee from which it was first isolated. There are two other strains of poliovirus: Type 2 (known as the Lansing virus) and Type 3 (known as the Leon virus). Immunity to one strain does not provide protection against the other two. All three strains are therefore included in the poliovirus vaccine.