{"nct_id":"NCT04498832","title":"Study to Assess the Immune Response and the Safety Profile of a High-Dose Quadrivalent Influenza Vaccine (QIV-HD) Compared to a Standard-Dose Quadrivalent Influenza Vaccine (QIV-SD) in Japanese Adults 60 Years of Age and Older","status":"COMPLETED","status_verified_date":"2025-09","start_date":"2020-10-21","start_date_type":"ACTUAL","primary_completion_date":"2021-01-14","primary_completion_date_type":"ACTUAL","completion_date":"2021-01-14","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["SNY"]}