Virology-focused Enanta Pharmaceuticals, Inc. took a positive step in its two-mechanism approach to providing a treatment for respiratory syncytial virus (RSV) on 26 September as its RSV L-protein inhibitor EDP-323 succeeded in a Phase IIa challenge study of healthy volunteers. But analysts called upcoming Phase IIb data for the firm’s N-protein inhibitor zelicapavir in pediatric RSV patients potentially the greater inflection point for Enanta’s program.
Enanta’s Phase II Challenge Data Position A Second Potential RSV Therapy
One of Enanta’s two antivirals in development for RSV showed efficacy in a healthy patient challenge trial. But analysts say field studies of infected patients are more telling.

More from Clinical Trials
A Phase III trial testing the cortisol modulator showed a benefit on PFS and OS in patients with platinum-resistant ovarian cancer.
The UK giant is forecasting peak sales of $5bn plus
Novo’s semaglutide has shown its benefits as an injectable in patients with peripheral arterial disease and as an oral agent in cardiovascular outcomes, but stronger results are expected soon from Lilly’s tirzepatide.
Pipeline Watch is a weekly snapshot of selected late-stage clinical trial events and approvals announced by pharmaceutical and biotech companies at medical and industry conferences, in financial and company presentations, and in company releases and statements.
More from R&D
The biotech is banking on itolizumab’s longer-term efficacy as well as unmet need in frontline acute graft-versus-host disease as it prepares to meet with the FDA.
The head of the Spanish medical dermatology specialist told Scrip that maintaining the status quo will only result in the continent’s life sciences sector slipping further behind the US and China.
Stakeholders are pleading for newly confirmed FDA Commissioner Martin Makary to stand up for the agency's high scientific standards and staff as he begins his term.