Full text: Available Index: LILACS (Americas) Main subject: Travel / Communicable Disease Control / Communicable Diseases / Vaccination Type of study: Etiology study / Risk factors Limits: Humans Country/Region as subject: Asia Language: Spanish Journal: Rev. chil. infectol Journal subject: Communicable Diseases Year: 2011 Type: Article Affiliation country: Chile Institution/Affiliation country: Pontificia Universidad Católica de Chile/CL