Some people think that Evolution is "theoretical".
Others, make sure that they take all the antibiotic, lest they evolve a super bug within their body that will kill them and perhaps many others.
There are people who've died from such things, you know. It's hardly "theoretical" for them.
They're dead.
New Tagline Test;
But...and I'm honestly inquiring, not trying to make a rhetorical point...does the influenza virus ever change into something other than influenza virus, or do successive generations remain simply new and improved influenza viruses?
I don't have the biology background to say, myself. Any information you might have on this topic would be most helpful.