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Post-marketing Surveillance Study for the Safety of Efluelda Tetra Pre-filled Syringe, a High-dose Quadrivalent Influenza Vaccine Administered to Adults 65 Years or Older in the Republic of Korea.

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Trial Profile

Post-marketing Surveillance Study for the Safety of Efluelda Tetra Pre-filled Syringe, a High-dose Quadrivalent Influenza Vaccine Administered to Adults 65 Years or Older in the Republic of Korea.

Status: Not yet recruiting
Phase of Trial: Phase IV

Latest Information Update: 19 Dec 2025

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At a glance

Most Recent Events

  • 15 Dec 2025 Status changed from recruiting to not yet recruiting.
  • 15 Dec 2025 Planned End Date changed from 5 Dec 2030 to 31 Jan 2028.
  • 15 Dec 2025 Planned primary completion date changed from 5 Dec 2030 to 31 Dec 2027.

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