National introduction of fractional-dose inactivated polio vaccine in Sri Lanka following the global "switch"

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National introduction of fractional-dose inactivated polio vaccine in Sri Lanka following the global "switch".

Gamage D, Ginige S, Palihawadana P.

WHO South East Asia J Public Health. 2018 Sep;7(2):79-83.

https://www.ncbi.nlm.nih.gov/pubmed/30136665

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