a regional reconnaissance on yellow fever in the sudan; with special reference to primate hosts.neutralization-tests with yellow fever virus performed on 666 human sera collected in the southern sudan imply that yellow fever is still endemic south of the 10th parallel, in the south-west border of the nuba mountains, and in the plains west of the nuba mountains as far north as el muglad. similar tests on bloods from 110 primates revealed a high rate of immunity among both baboons (papio sp.) (94%) and grivet monkeys (cercopithecus aethiops) (77%), and a very low rate (1 in 56) among galagos ...195514379007
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