you just have to read this article, page-6

LANI to win the market is a no-brainer... who likes or remembers to take a whole heap of pills...its a pain is what it is... & we all love convenience...

As for Tamiflu outselling Relenza a zillion to one... I suppose it takes a while for things to change, considering Tamiflu had practically the whole market to itself these past 10 years...

Also, I guess production limitations means there simply aint enough Relenza to go around...