Drug Profile

VXB 251

Alternative Names: RSV-hMPV-PIV3 vaccine; SP-0341; Trivalent RSV-hMPV-PIV3 vaccine; VXB-251

Latest Information Update: 09 Dec 2025

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At a glance

Originator Vicebio
Class Respiratory syncytial virus vaccines; Subunit vaccines; Viral vaccines
Mechanism of Action Immunostimulants

Orphan Drug Status

Orphan designation is assigned by a regulatory body to encourage companies to develop drugs for rare diseases.

No
New Molecular Entity No

Phase I Metapneumovirus infections; Parainfluenza virus infections; Respiratory syncytial virus infections

04 Dec 2025 Vicebio has been acquired by Sanofi
17 Nov 2025 Phase-I clinical trials in Metapneumovirus infections (Prevention, In adults, In the elderly) in Australia (IM, injection) (NCT07295028)
17 Nov 2025 Phase-I clinical trials in Parainfluenza virus infections (Prevention, In adults, In the elderly) in Australia (IM, injection) (NCT07295028)

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