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BACKGROUND Trials in Italy and Sweden showed high efficacy for three-component and five-component pertussis vaccines, and poor efficacy for a whole-cell vaccine licensed in the USA and a(More)
The prevalence of IgG ELISA antibodies against pertussis toxin (anti-PT) was studied in two Swedish seroepidemiological studies. One was performed in 1997 when the new pertussis vaccination program(More)