{"nct_id":"NCT00551629","title":"A Study to Test the Safety and Effectiveness of an Investigational Vaccine in Infants (V419-002)","status":"COMPLETED","status_verified_date":"2015-10","start_date":"2001-05","start_date_type":null,"primary_completion_date":"2003-03","primary_completion_date_type":"ACTUAL","completion_date":"2003-03","completion_date_type":"ACTUAL","phases":["PHASE2"],"tickers":["MRK"]}