Encephalitis Virus, Murray ValleyEncephalitis, ArbovirusMississippiFlavivirusEncephalitis VirusesAfrican AmericansArbovirusesEncephalitis Virus, JapaneseFlavivirus InfectionsPapua New GuineaVero CellsHistory, 19th CenturyWest Nile virusViral Nonstructural ProteinsMolecular Sequence DataAfrican Continental Ancestry GroupViral Envelope ProteinsIntra-Abdominal FatAmino Acid SequenceAntibodies, ViralCercopithecus aethiopsCohort StudiesRisk FactorsCross-Sectional StudiesMultivariate AnalysisBase Sequence