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flag Takeda’s dengue vaccine Qdenga showed strong, lasting protection in a major trial and is used in 11 countries, but remains unavailable in the U.S.

flag Takeda’s dengue vaccine Qdenga showed sustained protection for up to 4.5 years in a large trial, with 61.2% efficacy against confirmed dengue and 84.1% against hospitalization, rising to 90.6% after a booster. flag The vaccine, studied in over 20,000 children across Latin America, worked against all four dengue serotypes with no new safety issues. flag It has been approved in 41 countries and distributed in 11, with 18.6 million doses delivered. flag Brazil’s use of Qdenga correlated with reduced cases and hospitalizations. flag Amid a global dengue surge—over 14 million cases in 2024—Qdenga remains unavailable in the U.S., where Takeda withdrew its FDA application in 2023.

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