If that's your take on this, then I would have to submit that again, you haven't really understood what is being talked about. This research is about creating a vaccine - nothing more, nothing less. Now, it is a vaccine based on a slightly different kind of approach than previous vaccines but it still relies on taking an antigen from an actual virus and exposing your body to it in order to evoke an immune response.
You still seem to be talking as if this will somehow cause certain viruses to cease to exist. It won't.
This is something which will inhibit a virus from replicating once it gets inside a human body, just as other vaccines do, but (according to the researchers) in a more efficient and hopefully more durable manner.