Ethics backlash halts controversial neonatal Hep B vaccine trial in Guinea-Bissau
A proposed $1.6 million randomized trial funded by RFK Jr.'s HHS to study neonatal Hepatitis B vaccination in Guinea-Bissau would withhold vaccines from about 7,000 of 14,000 infants to compare outcomes; after international outrage, officials halted the study and pledged revisions, citing ethics concerns and potential non-specific harms.