I'm an only child. My mum and dad are six in each family. They're both twins, and they only wanted one. I always say to them though that they're lucky - it could have all gone wrong.
Surveying the way viruses have been discovered in the past, I came to the conclusion that I could use my technology that I developed as a graduate student - DNA microarray technology - to create a chip that would simultaneously screen for all viruses ever discovered, and furthermore have the built-in capability of discovering new viruses.