Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the use in this Registration Statement on Form F-1 of ABIVAX SA of our report dated July 28, 2023 relating to the financial statements of ABIVAX SA, which appears in this Registration Statement. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers Audit

Neuilly-sur-Seine, France

September 29, 2023