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A Phase 3, Multicenter, Randomized, Partially Blinded, Palivizumab-Controlled Study to Evaluate the Safety, Efficacy, and Pharmacokinetics of MK-1654 in Infants and Children at Increased Risk for Severe RSV Disease

Trial Profile

A Phase 3, Multicenter, Randomized, Partially Blinded, Palivizumab-Controlled Study to Evaluate the Safety, Efficacy, and Pharmacokinetics of MK-1654 in Infants and Children at Increased Risk for Severe RSV Disease

Status: Completed
Phase of Trial: Phase III

Latest Information Update: 03 Sep 2025

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At a glance

  • Drugs Clesrovimab (Primary) ; Palivizumab
  • Indications Respiratory syncytial virus infections
  • Focus Adverse reactions; Registrational
  • Acronyms SMART
  • Sponsors Merck Sharp & Dohme; Merck Sharp & Dohme Corp.; MSD KK

Most Recent Events

  • 13 Aug 2025 Status changed from active, no longer recruiting to completed.
  • 09 Jun 2025 According to a Merck and Co media release, based on the data from this study and the Phase 2b/3 CLEVER trial (MK-1654-004), the USFDA has approved ENFLONSIA (clesrovimab-cfor) for the prevention of RSVlower respiratory tract disease in newborns and infants who are born during or entering their first RSV season.
  • 20 Mar 2025 Planned End Date changed from 27 Oct 2025 to 13 Aug 2025.

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