Seasonality was the point in question.It will mutate a lot in...

Seasonality was the point in question.
It will mutate a lot in all stages but the less virulent strains will like the toirtoise win out over the hare, and along the way confer immunity onto the host species, thus dealing another blow to their hare(evolutionary) opponents.

I do NOT argue your call on panic & therefore perceived/expected demand for relenza.

Thinking back to SARS and your comment re Mad Monkey Disease
the key is USA, as per usual, once it's in USA in a big way then........ well.