For months, I've spent my Saturdays speaking with a convicted killer, writes Anne Connolly. He says he's innocent, others ...

New research shows how a specially trained population of immune cells keeps the peace by preventing other immune cells from attacking their own. The study provides a better understanding of immune ...

Three hundred and fifty-five cases have been reported in the ongoing measles outbreak in Texas, New Mexico and Oklahoma, but local officials say that it’s an undercount and that the virus could ...