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Clinical features of yellow fever cases at Vom Christian Hospital during the 1969 epidemic on the Jos Plateau, Nigeria.

Between 27 September and 27 December 1969, 103 patients diagnosed as having yellow fever were admitted to Vom Christian Hospital, near Jos, Nigeria. Headache and vomiting were the commonest presenting complaints, and 95% of the patients showed scleral icterus or bile pigments in the urine. Haemorrhage, signs of renal failure, and CNS involvement (agitation, seizures) were associated with a grave prognosis. The overall case-fatality ratio was 45.6%. The average duration of illness for fatal cases was 6.4 days and for non-fatal cases 17.8 days. Six illustrative case histories are presented.