Invivyd Receives FDA Clearance to Advance REVOLUTION Program with Phase 3 DECLARATION and LIBERTY Trials for COVID Prevention

07 October 2025 | Tuesday | News

FDA clearance paves the way for pivotal late-stage studies evaluating VYD2311, a monoclonal antibody alternative to vaccines, with trials expected to begin by year-end 2025 and top-line results anticipated mid-2026.

  • The DECLARATION (safety and efficacy vs. placebo) and LIBERTY (exploratory safety head-to-head and combination with mRNA-based COVID vaccination) clinical trials are expected to begin around year-end 2025; top-line data anticipated mid-2026
  • DECLARATION is a Phase 3, randomized, placebo-controlled clinical trial to evaluate prevention of COVID, at three months, from a single intramuscular (IM) dose of VYD2311, with longer-term protection anticipated. A second VYD2311 arm will evaluate monthly IM doses to demonstrate the safety and efficacy of more frequent dosing to support individual choice should at-risk persons wish periodic extra protection. Total expected enrollment of ~2,000 people
  • LIBERTY is a randomized, active-controlled safety and tolerability clinical trial of VYD2311 versus mRNA-based COVID vaccine with a co-administration arm exploring VYD2311 / vaccine combination; final alignment with the FDA on combination design with vaccination expected shortly. Total expected enrollment of ~300 people
  • DECLARATION and LIBERTY clinical trials to be funded by Invivyd’s recent capital raise; commercial launch quantities of VYD2311 are at-the-ready
  • Details on DECLARATION and LIBERTY clinical trials, and further areas of potential post-approval research in Invivyd’s broader REVOLUTION program, will be shared in a public investor event later this month

Invivyd, Inc. (Nasdaq: IVVD) announced that the U.S. Food and Drug Administration (FDA) has cleared the company’s Investigational New Drug (IND) application and provided feedback to advance the company’s REVOLUTION clinical program, Invivyd’s development program for VYD2311, a vaccine alternative monoclonal antibody candidate for the prevention of COVID.

The DECLARATION clinical trial is the company’s Biologics License Application (BLA)-enabling, Phase 3 pivotal clinical trial evaluating VYD2311 safety and prevention of COVID versus placebo. The LIBERTY clinical trial will assess the safety and tolerability of VYD2311 in a head-to-head clinical trial against mRNA-based COVID vaccine, as well as evaluate co-administration of VYD2311 with vaccination, subject to final alignment with the FDA. Together, these two clinical trials are designed to provide robust, medical practice-changing information to regulators, populations at risk for COVID, and policy makers seeking high-quality, safe, non-vaccine protection from COVID. Invivyd intends to initiate these clinical trials as soon as practicable, with the goal of year-end 2025 trial start and top-line data mid-2026. Additional studies in the REVOLUTION program may be contemplated for conduct post-approval of VYD2311, if a BLA is granted by the FDA, to further elaborate the profile of antibody prevention of COVID.

The DECLARATION Phase 3 clinical trial will evaluate prevention of symptomatic COVID at three months, with either a single dose or monthly doses of VYD2311, each administered via intramuscular (IM) injection, compared to placebo. A single IM dose of VYD2311 is expected to confer strong protection from COVID across the three-month measured dosing interval and beyond, with further clinical demonstration of long-term protection possible post-approval. By including a monthly dosing arm, the DECLARATION trial could also provide safety and efficacy data that support a VYD2311 indication and administration paradigm that enables individual choice and flexibility for extra periodic protection from COVID if desired, as opposed to a single centrally defined or mandated protection regimen. If approved, access to baseline and periodic extra protection via VYD2311 could, for example, support long interval protection such as annual or semi-annual dosing, as well as provide a mechanism for increased protection through additional doses for at-risk populations seeking extra protection or for individuals facing periods of enhanced risk of COVID.

The LIBERTY clinical trial is anticipated to demonstrate the meaningful safety and tolerability advantage expected for antibody-based prophylaxis versus mRNA-based vaccine-induced inflammatory mechanisms, and to provide safety and immunologic data regarding any interaction between the mRNA-based vaccine and VYD2311 for people who may receive both, if approved. Invivyd expects that its broader REVOLUTION clinical program may also include pediatric and other post-approval Phase 4 studies designed to establish VYD2311 and potential future Invivyd antibodies as the preferred option for protection from COVID over mRNA-based vaccination going forward.

“We are moving as fast as possible to bring Americans a new choice in protection from COVID,” said Marc Elia, Chairman of Invivyd’s Board of Directors. “We have designed the DECLARATION and LIBERTY clinical trials towards providing Americans with a convenient, safe, high-quality protective option to avoid COVID harm and burden without repeated use of inflammatory COVID vaccines. These trials and the broader REVOLUTION program will aim to generate clinical data that support a new approach to COVID prevention: one that enables at-risk Americans to exercise their individual freedom of choice to select the timing and quantity of safe, high-quality protection both annually and during periods of heightened risk such as medical vulnerability or major COVID waves, as well as during life’s important moments, such as family gatherings, holidays, and travel. COVID antibody medicines build on the science of natural, human immunity that begins at birth with maternal antibody transfer, and could serve as a critical, first-line option for protection for millions of Americans.”

Invivyd has produced commercial launch quantities of VYD2311 and has secured capital to support clinical trial execution through pivotal data readouts.

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