title: Response to letter.
authors.forename: Mugen
authors.initials: M
authors.lastname: Ujiie
authors.forename: Meng Ling
authors.initials: ML
authors.lastname: Moi
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Kato
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Takasaki
mesh_terms: D003715:Dengue / Q000175:diagnosis / Q000503:physiopathology; D003937:Diagnosis, Differential; D061345:Early Medical Intervention; D006801:Humans; D007835:Lassa Fever / Q000175:diagnosis / Q000503:physiopathology; D062706:Prodromal Symptoms; D014195:Travel; D015004:Yellow Fever / Q000175:diagnosis / Q000503:physiopathology