Most biologists take for granted the idea that all life evolved by natural selection over billions of years. They get on with researching and teaching in disciplines that rest squarely on that foundation, secure in the knowledge that natural selection is a fact, in the same way that the Earth orbits the Sun is a fact.
I don't see how anyone can watch the flu virus and not see that evolution is a fact. Every year a new vaccine must be created because the virus evolves and mutates to resist the vaccines.
Before you comment, please read the article and refute, if you can, the points.