Invivyd Announces Positive Full Phase 1/2 Clinical Data for VYD2311, a Next Generation COVID-19 Monoclonal Antibody for Potential Use as a Non-Vaccine Preventative and for Treatment of Active Infection

Core Insights - Invivyd, Inc. announced full Phase 1/2 clinical data for VYD2311, a next-generation monoclonal antibody (mAb) candidate aimed at preventing and treating COVID-19 [1] - VYD2311 is structurally 99%+ identical to previous antibodies and is designed to enhance potency and resistance against SARS-CoV-2 variants [2][10] - The Phase 1/2 study demonstrated that VYD2311 was well tolerated with mild to moderate adverse events and a long half-life, suggesting potential for long-term protection [4][5] Company Overview - Invivyd, Inc. is focused on developing innovative monoclonal antibodies to combat serious viral infectious diseases, starting with SARS-CoV-2 [18] - The company utilizes a proprietary technology platform to create antibodies that can adapt to viral evolution [18] Clinical Trial Details - The Phase 1/2 study involved 40 subjects and tested various routes of administration (IV, IM, SC) and doses to maximize flexibility for future registrational pathways [3] - VYD2311 showed a half-life ranging from 61 days (IV) to 76 days (IM), significantly longer than pemivibart's 49 days [5] Safety and Efficacy - All adverse events reported were mild to moderate, with no serious adverse events linked to the study drug [4] - The modeling analysis indicated that VYD2311 could provide robust protection against symptomatic COVID-19, potentially surpassing vaccine efficacy [8][10] Regulatory Plans - Invivyd plans to engage with the FDA in early Q3 2025 to discuss registration pathways for VYD2311 and subsequent COVID-19 mAbs [6][8] - The company aims to provide non-vaccine mediated protection for vulnerable populations, including the elderly and immunocompromised individuals [8][10]