If there was an epidemic, that definitely would make people accept vaccines. I wouldn't hope for that, of course, but if you wanted people to love vaccines, an epidemic would remind them how magical they are.

The world has been very careful to pick very few diseases for eradication, because it is very tough.

Vaccination is one of the easiest things on the way to development. It's much easier than roads and a great education system. It's very basic. It's one of the first things you want to get right.

Microsoft looks at new ideas, they don't evaluate whether the idea will move the industry forward, they ask, 'how will it help us sell more copies of Windows?

In my 20s, I worked very, very hard. I have a much more balanced life now.

If you've found some way to educate yourself about engineering, stocks, or whatever it is, good employers will have some type of exam or interview and see a sample of your work.

Vision without execution is daydreaming.