Government officials in Guinea-Bissau formally rejected and halted a clinical trial led by Danish researchers and funded by the US CDC and private foundations. The study proposed giving a birth dose of the hepatitis B vaccine to only half of 14,000 newborns to investigate alleged nonspecific harms and mortality benefits.
The trial was stopped after the Guinea-Bissau judicial police raided the Bandim Health Project's offices and seized vaccines. The WHO and global health authorities labeled the study unethical and biologically unfounded, arguing that the vaccine should be administered to all newborns.