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Cocrystal Pharma Announces Last Subject Dosed in Phase 1b Human Challenge Study Evaluating CDI-988 for Norovirus Prevention and Treatment

$COCPPress releaseSep 9, 2026, 7:00 AM ETRead the release

Cocrystal Pharma dosed the last subject in its Phase 1b human challenge study (NCT07198139) evaluating CDI-988 as both a preventive and treatment for norovirus, with no serious adverse events reported to date. The randomized, double-blind, placebo-controlled trial is being run at Emory University School of Medicine, dosing healthy subjects ages 18-49 infected with the GII.2 Snow Mountain Virus strain at the 1200 mg dose established as safe in an earlier Phase 1 study in Australia.

Key figures

Drug Name
CDI-988
Phase Of Trial
Phase 1b
Trial site
Emory University School of Medicine
Challenge strain
norovirus GII.2 (Snow Mountain Virus)
Dose administered
1200 mg
Study registration
NCT07198139
Preliminary data timing
late 2026 or early 2027
Highest phase1 dose tested
1200 mg
Norovirus us annual burden
$10.6 billion
Norovirus global cases annually
685 million
Norovirus global economic impact
$60 billion

AI analysis

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    COCP: Cocrystal Pharma Announces Last Subject Dosed in Phase 1b Human Challenge Study Evaluating CDI-988 for Norovirus Prevention and Treatment — AI Analysis | Signal8