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Policy. OPV cessation--the final step to a "polio-free" world

R Bruce Aylward1, Roland W Sutter, David L Heymann

  • 1Global Polio Eradication Initiative, World Health Organization, Geneva 27 Switzerland. aylwardb@who.int

Science (New York, N.Y.)
|October 29, 2005
PubMed

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