Event Brief
Jan 23, 2026 at 4:03 AM ET
US-backed Hepatitis B Vaccine Study Halted in Guinea-Bissau
By The BriefBrief
Guinea-Bissau halts a US-backed hepatitis B vaccine study on newborns for an emergency ethical review.
WHO: Guinea-Bissau Health Minister
WHAT: Halted hepatitis B vaccine study
WHEN: Jan 23, 2026 at 1:13 AM ET
WHERE: Guinea-Bissau
WHY: Ethics committee did not meet before study approval
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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