Replies to post #108703 on Biotech Values

[iwfal]

No one has conducted a trial in which HCV patients (as opposed to healthy volunteers) received a single DAA plus ribavirin without interferon for an extended period time; it would be insane to do so.

I don't understand the bolded part (not busting your chops). PROVE 3 did single DAA plus IFN. Why not single DAA plus rib? And if rib is worth adding to 2 DAA protocol as a prevent-relapse drug, then why not a single DAA?