The term "dual use" is a technical one. But it is not as special a category as one might think. Everything has dual use, says journalist Michael Specter: Planes are amazing inventions for transporting people and things but they can also be used as weapons, as happened on September 11th, 2001. As far as viruses are concerned, it is the job of science to do as much research as possible, so that we can understand how they work and find vaccines or other ways to contain them. And is the scientist’s job to explain to the wider public what exactly it is they are doing and what good it can do.