BioCentury
ARTICLE | Deals

First clinical evidence spurs Sanofi’s takeout of Vicebio for $1.15B up front

French pharma buys vaccine tech developer soon after early signs of safety, tolerability in Phase I study

July 22, 2025 5:49 AM UTC

Early data emerging from a clinical study of the first product derived from Vicebio’s vaccine platform have spurred Sanofi’s decision to acquire the start-up for $1.15 billion up front.

The deal gives Sanofi (Euronext:SAN; NASDAQ:SNY) control of London-based Vicebio Ltd.’s Molecular Clamp technology, which confers stability, manufacturing and efficacy benefits on vaccine candidates. The first of those, bivalent product VXB-241 for respiratory syncytial virus (RSV) and human metapneumovirus (hMPV), began a Phase I study in September 2024...

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