Silent Circulation of Rift Valley Fever in Humans, Botswana, 2013-2014
Sanderson, Claire E.
Paweska, Janusz T.
Alexander, Kathleen A.
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We evaluated the prevalence of Rift Valley fever virus IgG and IgM in human serum samples (n = 1,276) collected in 2013-2014 in northern Botswana. Our findings provide evidence of active circulation of this virus in humans in the absence of clinical disease in this region.