About 45% of trial participants had a history of JE and/or YF vaccination, and an interim analysis 1.5 years after vaccination showed a trend of increased VE in participants previously immunized against JE [ 6 ].
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Efficacy and Safety of a Tetravalent Dengue Vaccine (TAK-003) in Children With Prior Japanese Encephalitis or Yellow Fever Vaccination.
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The YF vaccination subgroup (regions in Latin America) had the lowest dengue burden, but the incidence curve showed an increasing trend after the first year postvaccination.