East African Medical Journal, Volume 69, No. 8, Year 1992
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During a measles outbreak investigation in Siaya district, clustering of many measles cases was found to be an important determinant for measles mortality. A high proportion of cases were under one year of age. Case fatality rates were higher than previously reported from Kenya, particularly among infants. Vaccine efficacy was 18%. Alternative ways of protecting infants are discussed. -Authors