Event Brief
Jan 23, 2026 at 10:09 AM ET
Guinea-Bissau Halts Controversial US Vaccine Study
By The BriefBrief
Guinea-Bissau officials pause hepatitis B study amid ethics concerns.
WHO: Guinea-Bissau officials, US health officials
WHAT: Suspension of hepatitis B vaccine study
WHEN: Jan 23, 2026 at 6:00 AM ET
WHERE: Guinea-Bissau, West Africa
WHY: Ethics concerns regarding the study
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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