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November 6, 2026•0 views
News Brief

Guinea-Bissau halts controversial US-funded hepatitis B vaccine trial

Guinea-Bissau halted a US-funded hepatitis B vaccine trial after it failed to gain government approval.

Guinea-Bissau halts controversial US-funded hepatitis B vaccine trial
Image: Al JazeeraCredit: Image: Al Jazeera
Multi-Source Verification:Synthesized across 1 independent reporting sources.
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In Brief

  • •Guinea-Bissau halted a US-funded hepatitis B vaccine trial after it failed to gain government approval.
  • •The trial aimed to assess the effects of WHO-recommended vaccines on two groups of babies, withholding the vaccine from one group.
  • •The project, led by Danish researchers Christine Stabell Benn and Peter Aaby, faced global scrutiny over ethical concerns.
  • •The trial was funded by the US Centers for Disease Control and Prevention (CDC) and involved 14,000 babies.
  • •Authorities seized vaccine batches and are investigating whether the trial complied with safety standards.

Why It Matters

The halt of the hepatitis B vaccine trial in Guinea-Bissau raises significant ethical and public health concerns. The trial's design, which withheld a critical vaccine from one group of babies, has been widely criticized as unethical. This incident highlights the tension between scientific research and public health priorities, particularly in regions where vaccine access is already limited. The trial's suspension underscores the need for stricter regulatory oversight and ethical guidelines in clinical research, especially when involving vulnerable populations.

Key Details

Funding Amount
$1.6 million
Number of Babies Involved
14,000
Funding Source
US Centers for Disease Control and Prevention (CDC)
Research Group
Bandim Health Project, University of Southern Denmark
Key Researchers
Christine Stabell Benn and Peter Aaby
Government Review Outcome
Paused and reviewed

Context & Background

Guinea-Bissau has one of the highest numbers of people living with hepatitis B, with one-fifth of the 2.2 million population affected. The country struggles with limited vaccine access, authorizing the vaccine at up to six weeks after birth.

Original Reporting & Sources

VNews is an independent briefing product. Original reporting remains credited to the following publishers:

Al Jazeera
Primary Source
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