{"nct_id":"NCT00561080","title":"Immunogenicity and Safety of a 1-dose Regimen of a Zoster Vaccine Versus Different 2-dose Regimens in Participants ≥ 70 Years of Age. (V211-043)","status":"COMPLETED","status_verified_date":"2018-12","start_date":"2007-10-26","start_date_type":"ACTUAL","primary_completion_date":"2009-06-03","primary_completion_date_type":"ACTUAL","completion_date":"2009-06-03","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["MRK"]}