006020000a22002050004500003000900000005001700009264004900026020001800075022001400093110003100107245006800138246006800206300001500274041000800289650003300297650001100330650002700341650001700368040001100385PH-MaWHO20241108112718.0  aGeneva : bWorld Health Organization,c2012.  a9789241580472  a0254-296X  aWorld Health Organization.  aInternational travel and health: situation as on 1 January 2012 1aVoyages internationaux et sante : situation au 1er janvier 2012  axi, 260 p.  aeng  aCommunicable disease control  aTravel  aVaccinationxStandards  aRisk factors  aWHOLIS