{"nct_id":"NCT04109222","title":"Collection of Serum Samples From Children and Older Adults Receiving the 2019-2020 Formulations of Fluzone® Quadrivalent and Fluzone® High-Dose Influenza Vaccines, Respectively","status":"COMPLETED","status_verified_date":"2025-09","start_date":"2019-09-30","start_date_type":"ACTUAL","primary_completion_date":"2019-12-10","primary_completion_date_type":"ACTUAL","completion_date":"2019-12-10","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["SNY"]}