Eva Vertes was 19 at the time of this TED talk. She discusses a little bit about the work on Alzheimer's that made her famous at the age of 17 and now her ideas about how to look at cancer differently. This is apparently what a microbiology prodigy looks like.
Passion - check
Inspiration - check
Intensity - check
Worth 20 minutes of your time - you bet!
(If you are really short on time, you can skip the first 5:15 of background and get right into the talk about cancer)