Options Doggy has stumbled upon a good one: Japan struggling with Tamiflu dilemma. So if nervous system shutdown, or sudden death aren't appealing, might want to make a mental note.
The problem is seen as serious enough in Japan that new clinical trials will be started: Roche, Chugai to conduct new trials for Tamiflu.
As the Big Dog has pointed out, Gilead (GILD) is a touch weaker today. GILD has licensed Tamiflu to Roche in exchange for royalty payments. Something to keep any eye on.