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Complexity Digest 2009.17 - 05.01
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2009/08/14

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Editor-in-Chief: Carlos Gershenson
Founding Editor: Gottfried Mayer

Type 2 Poliovirus Back From The Dead in Nigeria, Science
 









Summary: In 1999, the Global Polio Eradication Initiative scored an unequivocal
victory: It wiped one of three serotypes of wild poliovirus, type 2, off the
face of the earth, except for samples stored in labs for study or vaccine
creation. That triumph left just two foes to battle, poliovirus types 1 and 3,
which have continued to put up quite a fight. But now a version of type 2 has
returned. Springing back to life from a weakened form of the pathogen used in a
vaccine, poliovirus type 2 is causing a runaway outbreak in Nigeria, where types
1 and 3 are also raging. In July, the World Health Organization issued a global
alert warning that type 2 poliovirus in Nigeria posed an "increasing risk of
international spread." It's a stunning setback for the initiative, now already 9
years past its original deadline for vanquishing the virus.
Source: Type 2 Poliovirus Back From The Dead in Nigeria[
http://dx.doi.org/10.1126/science.325_660 ], Leslie Roberts, DOI:
10.1126/science.325_660, Science Vol. 325. no. 5941, pp. 660 - 661, 2009/08/07

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