Ebola Virus Infection in Man: A Serological and Epidemiological Survey in the Cameroons

Abstract
The presence of antibodies to Ebola virus among 1,517 apparently healthy persons in five regions of the Cameroons was tested using indirect immunofluorescence. A positive rate of 9.7% was found, confirming that the virus circulates in the absence of clinical cases. Highest rates were found among Pygmies, young adults, and rain forest farmers.