Not being a comic book fan, being thrown into that and seeing the extreme - it's taken very seriously. So I tried to do as much learning as I could about it so I wasn't mean or anything.

Right now I'm working on the back handspring.

I got his initials tattooed on the back of my neck, you know, since we both now have the same initials.

I've always been a good kid.

Vaccines and antibiotics have made many infectious diseases a thing of the past; we've come to expect that public health and modern science can conquer all microbes. But nature is a formidable adversary.

Competitive sports may be where exercise becomes 'fun' for children who are good at it, but for those who are less talented, it is where exercise becomes not only physically demanding but also emotionally painful and socially humiliating.

Poverty is just a word. I mean, how do you dismantle capitalism? It's through small actions. It's through breaking down poverty as a lived experience of not enough food, of your health not being good. So those are things that we can actually work on without ever having to call a politician.

GAVI works collaboratively with the private sector - from investment banks to vaccine suppliers to corporations to members of the Forbes 400 - to find new and better ways to raise and apply resources and broaden the base of participants in global health.