
Ethics questions halt US-backed hepatitis B birth-vaccine trial in Guinea-Bissau
An Africa CDC-backed US-funded birth-dose hepatitis B vaccine trial in Guinea-Bissau has been cancelled due to ethical concerns over its design; officials say it will only resume after a redesign to meet ethical norms, with ongoing talks between Guinea-Bissau and the US. Critics argued the trial could deprive thousands of children of vaccination for the sake of a coin-toss allocation, while supporters say it could improve access if properly implemented.






