<style face="normal" font="default" size="100%">Protective efficacy in humans of killed whole-vibrio oral cholera vaccine with and without the B subunit of Cholera Toxin</style>

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0<style face="normal" font="default" size="100%">Protective efficacy in humans of killed whole-vibrio oral cholera vaccine with and without the B subunit of Cholera Toxin</style><style face="normal" font="default" size="100%">Protective efficacy in humans of killed whole-vibrio oral cholera vaccine with and without the B subunit of Cholera Toxin</style>