Controversial US-backed hepatitis B trial on African newborns halted

A US-backed hepatitis B vaccine trial in newborns in Guinea-Bissau, which drew global backlash, has been halted, its lead researcher said. Frederik Schaltz-Buchholzer said it was "now clear" the study "will not move forward" in the West African country. The trial was to be funded by the US Centers for Disease Control and Prevention.