A new era for hemophilia B treatment.

In this issue of Blood, Santagostino et al, in their phase 3 study, demonstrate efficacy and safety of recombinant fusion protein linking coagulation factor IX (FIX) with albumin (rIX-FP) which, along with the other 2 extended half-life FIX products, heralds a new era for the treatment of hemophilia B.