Enzyme targets sepsis; International team tests new cancer drug delivery tech; Chance vs. lifestyle: Which is most likely to cause cancer?;

> A new study indicates that a human membrane-bound enzyme called CD39 could target an "Achilles heel" for sepsis. Release

> A research team drawn from North Carolina and China has used graphene strips to deliver cancer drugs to specific areas of a cell. They tested the tech in animal models for lung cancer. Release

> Chance mutations are responsible for the lion's share of new cancer cases, according to new research. Lifestyle matters like smoking are far less likely to cause cancer than chance. Story