Polio Vaccines
Studies describe new findings in polio vaccines research
Published in Medical Letter on the CDC and FDA, November 6th, 2005
Study 1: Oral polio vaccine virus strains did not persist for extended periods after a vaccine switch in New Zealand.
According to recent research published in the journal Lancet, "On February 1, 2002, inactivated poliomyelitis vaccines replaced live-attenuated oral poliovirus vaccine (OPV) in New Zealand's immunization schedule, allowing systematic monitoring of OPV virus circulation. Findings of pediatric inpatient surveillance indicate that 7% of children excreted polioviruses before this switch, but none did so 1 month...
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