Swine flu defined as unusual, distinctive from ordinary seasonal flu

SHOOT: I'm picking up the word 'unusual' a lot:
- healthy adults dying
- swine/avian flu
- recombinant strain
- transmissable between humans
- many schools and other public places in Mexcio already locked down
- WHO declaring heightened world flu alert status etc

clipped from www.cdc.gov This is very late for seasonal influenza.  The routine kind of influenza strains that we see every year.  That's declining.  The regular season is in its pale really.  What we're seeing now is different.  It's not seasonal influenza, it's what we call Swine Influenza.  Has different characteristics and we don't really see enough of it in people to have a seasonality. These are quite unusual cases.  It's in fact a little bit easier that it's occurring now in the end of the influenza season because we don't have so much noise or so much background influenza to look through.  But it is, you know, initially we want to take very special measures to make sure this really was a different strain because sometimes towards the end of a season it can be harder to take the strains that are just regular flu.  So this is not routine seasonal flu it's just occurring at the tail end of the seasonal – of the season of regular influenza.