There is NO scientific literature that PSI 7977 and GS 5885 combination is safe or effective. Starting a phase III combo may be a common sense based on Daclastvir and PSI 7977 data but it is no study to prove it that GILD combination is safe. If one bad out come happens in phase III ( which is a strong possibility), single all oral pill will become single all anal pill in one second.
BMY has wasted lot of money in Hep C, first buying gamma interferon for 1 B and now disaster of INHX for 2.5 B. Buying out VRTX is the best next option for them to full fill Hep C dream.