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Vaccines are a critical tool for the control strategy for foot-and-mouth disease (FMD) in Mongolia where sporadic outbreaks regularly occur. A two-dose primary vaccination course is recommended for most commercial vaccines though this can be logistically challenging to deliver among nomadic pastoralist systems which predominate in the country. Although there is evidence that very high potency vaccines can provide prolonged duration of immunity, this has not been demonstrated under field conditions using commercially available vaccines. This study compared neutralising titres to a O/ME-SA/Panasia strain over a six-month period following either a two-dose primary course or a single double-dose vaccination among Mongolian sheep and cattle using a 6.0 PD50 vaccine. Titres were not significantly different between groups except in sheep at six-months post vaccination when the single double-dose group had significantly lower titres. These results indicate the single double-dose regimen may be

United kingdomUnited statesIsle of wightWorld organisation for animal healthSciences research councilWorld bank livestock commercialization projectPirbright instituteRural affairs defraRoutledge handbook of latin american developmentBoston college department of economicsCentral veterinary laboratoryEuropean unionAgriculture organization of the united nationsWorld organization for animal healthDepartment for environmentAuthority for veterinary services