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Typhoid Vi Vaccine Effectiveness in Hechi, Guangxi, China
This study is part of International Vaccine Institute (IVI)'s typhoid Vi demonstration project that aims to accelerate the rational introduction of Vi vaccines in typhoid endemic countries. The purpose of this study is to determine the effectiveness of the Vi vaccine following a mass typhoid immunization campaign in an endemic area in Hechi City in the Guangxhi province of China. The cost-effectiveness and safety of Vi vaccination will also be evaluated.
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