Yes. It's a great question, and obviously as a Canadian and a taxpayer, I would have the same concerns and questions.
Tamiflu is approved by Health Canada for the prevention and treatment of influenza. As a result, it has gone through the rigorous clinical trial program that all drugs that get approved in Canada, or for that matter across the world--United States, Europe--need to go through to prove their efficacy and safety. Through the clinical trial work, that has been done. The evidence is that Tamiflu reduces the signs and symptoms and outcomes of the influenza virus and also some of the complications that might occur from that, like bronchitis. So the data shows clearly that there is a net positive effect, and that's the reason the drug was approved by Health Canada.
As far as the H5N1 virus, which is the avian flu virus, is concerned, there are case studies across the world, where that virus has infected human beings, that indicate it is an effective medication to treat individuals who are infected with the avian flu or, for that matter and probably more importantly, to prevent them from getting it in the first place.