title: Revised recommendations for yellow fever vaccination for international travellers, 2011.
mesh_terms: D000349:Africa / Q000453:epidemiology; D019353:Endemic Diseases / Q000517:prevention & control; D006801:Humans; D012307:Risk Factors; D013020:South America / Q000453:epidemiology; D014195:Travel; D014611:Vaccination; D014944:World Health Organization; D015004:Yellow Fever / Q000145:classification / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission