Effect of a Booster Dose of the Japanese Encephalitis Vaccine IC51

Effect of a Booster Dose of the Japanese Encephalitis Vaccine IC51 on Long Term Immunogenicity. An Uncontrolled, Open-label Phase 3 Study.

The objective is to assess the effect of a booster vaccination on immunogenicity of IC51 in terms of seroconversion rate.

Main Inclusion Criteria:

• Healthy adults who completed the primary immunization in study IC51 309
• Male and female healthy subjects aged at least 18 years with written informed consent and either no childbearing potential or negative pregnancy test

Main Exclusion Criteria:

• History of immunodeficiency or immunosuppressive therapy, known Human Immunodeficiency Virus (HIV), or drug addiction including alcohol dependence