African scientists have criticised a study of hepatitis B virus birth dose vaccination as being unethical. Gilbert Nakweya reports.

Guinea-Bissau is one of the world's poorest countries, with half its population considered poor, according to the World Bank. It has emerged as a hub for drug trafficking between Latin America and ...

The U.S. is giving $1.6 million to researchers to study how the hepatitis B vaccine affects newborns in Guinea-Bissau. Local officials say the trial is suspended. U.S. officials say that's inaccurate.