Biological WarfarePlagueBiological Warfare AgentsYersinia pestisChemical WarfareLiterature, MedievalSiphonapteraChemical Warfare AgentsPlague VaccineGlandersBioterrorismBurkholderia malleiAnthraxMadagascarYersinia pseudotuberculosisMilitary ScienceVirulencePsychological WarfarePore Forming Cytotoxic ProteinsVirulence FactorsBacterial ProteinsResearchBacterial Outer Membrane Proteins