Evolution in Action

I was reading this news article about how the most common flu is now resistant to the main drugs. Which reminded me of the book I read about evolution still working in our times -- The Beak of the Finch. Basically, part of the process for the evolution is that once traits that cannot survive die off, the traits that did survive will start to proliferate. So if a drug has been used to kill off most flu strains, then resistant flu strains that survived will thrive. Well, that means job security for medical industry, I guess. ;)