antiviral news

Postexposure prophylaxis with nirmatrelvir-ritonavir for five or 10 days does not reduce the risk for symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, according to a study published in the July 18 issue of the New England Journal of Medicine.

Cocrystal Pharma, Inc. (Nasdaq: COCP) (“Cocrystal” or the “Company”) today reported favorable safety and tolerability results from the single-ascending dose (SAD) cohorts of the Phase 1 study in healthy volunteers with CDI-988, its potent, oral, pan-viral protease inhibitor. CDI-988 was specifically designed and developed using Cocrystal’s proprietary structure-based drug discovery platform technology as a broad-spectrum antiviral inhibitor to a highly conserved region in the active site of 3CL viral proteases. It is being developed as the first dual, broad-spectrum antiviral for the treatment of norovirus and coronaviruses.

Nirmatrelvir-ritonavir (Paxlovid) did not prevent people exposed to COVID-infected household members from getting infected with the virus, according to the final results of the phase II/III EPIC-PEP study. Across more than 2,700 exposed adults in the trial, symptomatic confirmed infections at 14 days occurred in 2.6% of those taking a 5-day course of the antiviral medication, 2.4% of those receiving a 10-day course, and 3.9% of the placebo recipients. Neither of those differences versus the placebo group were statistically significant (P=0.17 and P=0.12, respectively), reported Jennifer Hammond, PhD, head of antiviral development at Pfizer in Collegeville, Pennsylvania, and colleagues.