{"nct_id":"NCT05249829","title":"A Study to Evaluate the Immunogenicity and Safety of Omicron Variant Vaccines in Comparison With mRNA-1273 Booster Vaccine for COVID-19","status":"COMPLETED","status_verified_date":"2024-07","start_date":"2022-02-16","start_date_type":"ACTUAL","primary_completion_date":"2023-06-23","primary_completion_date_type":"ACTUAL","completion_date":"2023-06-23","completion_date_type":"ACTUAL","phases":["PHASE2","PHASE3"],"tickers":["MRNA"]}