There are numerous reports that GSK have been working on IV relenza like this one a few weeks ago.
''(GlaxoSmithKline, which makes Relenza, has shelved plans to test an intravenous form of the drug in the United States, but is in discussions with a WHO-organized treatment network in Southeast Asia to test the new formulation there.)''
http://www.cbc.ca/cp/health/070318/x031806A.html
AND just to put you in your box once and for all. Heres a snippet from a GSK employee on IV relenza.
Your credibilty is SHOT.
''GlaxoSmithKline, Europe's biggest drugmaker, is developing an intravenous form of Relenza, Nancy Pekarek, a U.S. spokeswoman for the London-based company, said yesterday. Scientists are still formulating the compound, and testing in people hasn't started, she said.''