Long-term Follow-up of Immunogenicity of a Single Dose of Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) in Toddlers

This is a long-term follow-up of the persistence of immune response in participants who previously received a single dose of JE-CV at age 12 to 18 months in Study JEC02 (NCT00735644) . No vaccination was administered during the present long-term follow-up study. Primary Objective: * To describe the yearly persistence of humoral immune response to Japanese encephalitis after a single dose of JE-CV