Letter L

Lansing virus

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Type 2 poliovirus.

Named after the city in Michigan where the first patient lived who was found to have this virus.

There are two other strains of poliovirus: Type 1 (known as the Brunhilde 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

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