Children given inactivated polio vaccine (IPV) at least 6 months after the oral poliovirus vaccine (OPV) series develop better immunity, according to a report published online July 11 in the Lancet.
The search for vaccines to fight poliomyelitis started in the 1920s, but it wasn't until the 1950s that the search bore fruit with the introduction of two vaccines. The first was the Salk inactivated ...
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