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.

So far, this all tracks perfectly with the many concerns presented when Robert Kennedy Jr. was nominated to be Secretary of ...

A planned U.S.-funded study of a hepatitis B vaccine drew widespread condemnation from researchers. Now the host country says it cannot proceed.

Catholic medical professionals and ethicists had mixed reactions to the Centers for Disease Control and Prevention’s (CDC) ...