I think that people's resistance to vaccination isn't going to disappear until we address some of the nonmedical reasons for that resistance and people's discomfort and distrust of the government. That's bigger than what most medical professionals can handle.

Herd immunity is, it turns out, not incredibly easy to understand. It took me quite a bit of reading before I fully grasped it. But understanding herd immunity is essential to understanding why we vaccinate the way we do.

Nigeria and Pakistan are two countries that have had a lot of trouble with polio. And part of the reason is that there's a lot of political unrest, and people really distrust what the government is doing. That has an effect on people's health, and it has an effect on the health of children.

One of the mysteries of hep B immunization is that vaccinating only 'high risk' groups, which was the original public health strategy, did not bring down rates of infection.

What has become clear from the science is that we cannot burn all of the fossil fuels without creating a very different planet.

I'm thrilled to be working with the Science Channel. A chance to shine a light on the wonder and exciting possibilities of science with such a smart and talented team is a dream come true for me. It's very gratifying to me personally, and it's also a way to honor my family.

We're not going to just duplicate 'Heavy Rain,' because we are passionate about innovation and discovery, so we're trying to discover new ground and see how we can move from 'Heavy Rain' and create something even more immersive.

By coordinating with international partners on scientific issues, we strengthen the U.S. scientific enterprise and promote the free exchange of ideas in other nations.