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Abstract

Italy’s health ministry introduced changes to the immunisation schedules for children on 7 April 1999, including immunisation against poliomyelitis. The changes included the replacement of the first two childhood doses of oral poliomyelitis vaccine (OPV)

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/content/10.2807/esm.05.06.00039-en
2000-06-01
2017-11-17
http://instance.metastore.ingenta.com/content/10.2807/esm.05.06.00039-en
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