Enanta Pharmaceuticals to Present Data for Zelicapavir, an Oral, Once-Daily, N-Protein Inhibitor, in Development for the Treatment of Respiratory Syncytial Virus, at IDWeek™ 2026

Enanta Pharmaceuticals (ENTA) will present data for its investigational RSV treatment zelicapavir at IDWeek 2026 on October 22, 2026.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

WATERTOWN, Mass.--(BUSINESS WIRE)-- Enanta Pharmaceuticals, Inc. (NASDAQ:ENTA), a clinical stage biotechnology company dedicated to creating novel, small molecule drugs for viral infections and immunological diseases, today announced that data for zelicapavir, its oral, once-daily, N-protein inhibitor in development for the treatment of respiratory syncytial virus (RSV), will be presented at IDWeek™ 2026 being held October 21-24, 2026 virtually and at the Walter E. Washington Convention Center in Washington, DC.

Details of the presentation are as follows:

Poster Title: Zelicapavir Decreases Time to Complete RSV Symptom Resolution, Hospitalization and Viral Load in a Global, Randomized, Double-Blinded, Placebo (PBO)-Controlled Phase 2 Trial of High-Risk Adults
Poster Session: Novel Agents
Poster Number: 3
Date: Thursday October 22, 2026
Time: 12:15 PM - 1:30 PM ET
Location: Poster Hall B-C
Presenter: Christopher E. Harris, M.D.

The poster will be available to view on the conference platform during the conference and on the Company’s website here. Further information about IDWeek™ 2026 can be found here.

About Enanta Pharmaceuticals, Inc.
Enanta is using its robust, chemistry-driven approach and drug discovery capabilities to become a leader in the discovery and development of small molecule drugs for viral infections and immunological diseases. In virology, Enanta’s clinical programs are focused on the development of first-in-disease and best-in-disease treatments for respiratory syncytial virus (RSV). The Company’s immunology pipeline aims to develop treatments for inflammatory diseases by targeting key drivers of the type 2 immune response, with KIT, STAT6 and MRGPRX2 inhibition.

Glecaprevir, a protease inhibitor discovered by Enanta, is part of the only treatment approved for curing both acute and chronic hepatitis C virus (HCV) infection and is sold by AbbVie in numerous countries under the tradenames MAVYRET^® (U.S.) and MAVIRET^® (ex-U.S.) (glecaprevir/pibrentasvir). A portion of Enanta’s royalties from HCV products developed under its collaboration with AbbVie contribute ongoing funding to Enanta’s operations. Please visit www.enanta.com for more information.

View source version on businesswire.com: https://www.businesswire.com/news/home/20261013575271/en/

Media and Investors Contact
Jennifer Viera
617-744-3848
jviera@enanta.com

Source: Enanta Pharmaceuticals, Inc.

Key Terms

randomized medical

Randomized means participants or units in a study are assigned to different groups by chance rather than by choice, like flipping a coin to decide who gets a new treatment and who gets a comparison. For investors, randomized designs matter because they reduce bias and make results more trustworthy, so outcomes from randomized studies carry more weight when assessing regulatory approval, commercial prospects, and the risk that trial results will change a company’s valuation.

double-blinded medical

A double-blinded study is a test where neither the participants nor the people administering the treatments know who is getting which version, so expectations can't influence the results. For investors, that fairness check makes clinical or product test results more reliable—think of it like a blind taste test where both the taster and server are kept unaware—so positive outcomes from double-blinded studies carry more weight for valuation and regulatory confidence.

placebo-controlled medical

"Placebo-controlled" describes a testing method where one group receives the actual treatment or intervention, while another group receives a harmless, inactive version called a placebo. This approach helps determine whether the real treatment has genuine effects beyond psychological expectations. For investors, understanding this ensures confidence that reported benefits are real and not influenced by bias or false perceptions.

phase 2 medical

Phase 2 is the mid-stage clinical trial where a new drug or treatment is tested in a larger group of patients to see if it works and to keep checking safety after initial human testing. Think of it as a field test that proves whether a product actually delivers its promised benefit. Investors watch Phase 2 closely because its results strongly influence a medicine’s chances of reaching the market, the size of its potential sales, and the company’s valuation.