Double blinded, randomized, placebo-controlled, dose finding, multi-center, phase 1 trial in 48 healthy volunteer subjects.

After completion of screening procedures, the subjects are randomized to one of four treatment groups (different dosage strengths and placebo) All subjects will receive study treatment at day 0 and will return on day 28. Subjects randomized to treatment groups with two vaccinations will receive a second treatment at day 28.

Subjects will return on day 56 for the final visit.

Inclusion Criteria:

• healthy volunteers aged 18 to 55
• subjects of child bearing potential must perform reliable method of contraception

Exclusion Criteria:

• immune deficiency, history of HIV, HBV, HCV
• drug addiction
• vaccination within 4 weeks prior to study or planned vaccination during study
• prior receipt of any Zika vaccine
• recent infection 1 week prior to screening
• relevant medical history interfering with aim of study
• neoplastic disease, hematological malignancy
• history of autoimmune disease
• psychological condition that affects ability to participate in the study
• history of severe adverse reactions to vaccine administration
• history of anaphylaxis
• allergic reactions, abnormal lab values, or concomitant medication per decision of the investigator
• use of immunosuppressive drugs within 30 days before screening or planned use during study
• receipt of blood products within 120 days before screening or planned use during study
• pregnancy, unreliable contraception method
• decision of the investigator
• regular blood plasma donor

http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf