Silent Circulation of Rift Valley Fever in Humans, Botswana, 2013–2014
Claire E. Sanderson, Ferran Jori, Naazneen Moolla, Janusz T. Paweska, Nesredin Oumer, and Kathleen A. Alexander
Author affiliations: Virginia Tech, Blacksburg, Virginia, USA, and Chobe Research Institute, Center for African Resources:; Communities, Animals, and Land Use, Kasane, Botswana (C.E. Sanderson, K.A. Alexander); Animals, Health, Territories, Risks, Ecosystems Unit, Université de Montpellier, Montpellier, France, and Botswana College of Agriculture, Gaborone, Botswana (F. Jori); National Institute of Communicable Diseases, Sandringham-Johannesburg, South Africa (N. Moolla, J.T. Paweska); University of the Witswatersrand, Johannesburg (J.T. Paweska); Botswana Ministry of Health, Gaborone (N. Oumer).
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Figure
Figure. Number of Rift Valley fever virus IgG-positive IgG-negative human serum samples by age at time of testing, Botswana. The overlaid red lines represent ages of patients who also tested positive for Rift Valley fever virus IgM. No patients <17 years of age tested IgG positive for Rift Valley fever virus (black outline).
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