Vaccines

Guinea-Bissau hepatitis B newborn vaccine trial halted

The lead researcher said the trial will not proceed because it lacked necessary government approval.

Reported by 2 outlets Wednesday, October 21, 2026

A syringe drawing a dose from a COVID-19 vaccine vial
Photo: Public domain

The lead researcher said the proposed hepatitis B vaccine trial in newborns in Guinea-Bissau “will not move forward” because researchers had not received necessary government approval, The Guardian reported. The study was to receive $1.6m from the CDC and another $1.6m from private partners, according to the newspaper.

MedPage Today reported that judicial police raided the researchers’ offices and seized vaccine doses. The Guardian said Guinea-Bissau’s government now has control of the vaccines after authorities searched the Bandim Health Project offices on Monday. Guinea-Bissau plans to offer a universal hepatitis B birth dose in 2028, The Guardian reported. The CDC did not respond to questions about whether its funding would instead support vaccination of newborns.

Reporting on this story

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FDA approves GSK and Ionis hepatitis B drug Hibsago

For eligible adults without cirrhosis, Hibsago is used with existing antivirals. 19% of trial patients maintained viral control 24 weeks after stopping all hepatitis B treatment.

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