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Summary
Hemagglutination-inhibiting antibody responses with selected Group B arthropod-borne virus antigens were studied following administration of living attenuated 17D strain yellow fever vaccine to human subjects who had (a) no previous Group B arbovirus experience, (b) only 17D strain vaccine previously, (c) previous inapparent natural Japanese encephalitis virus infection and (d) complex Group B arbovirus experience previously. The results indicate the following: