“The work our Foundation has done in vaccines through Gavi has been the most important thing that we’ve done. The very creation of the Foundation came about because we saw this great inequity, and we gave early grants for vaccines, but then saw there was something missing. So several people in global health, including the Foundation, decided that starting something to buy vaccines for the world’s poorest children was absolutely needed. And in the year 2000 that was announced as Gavi. So now we’ve had 15 years of incredible success: getting people to make new vaccines for poor world diseases, getting the prices down for those, getting them introduced and delivered. That’s why we’ve saved millions of lives, and every time people look at aid money and ask what’s the most impactful thing they can find in that whole space, Gavi gets ranked at the very top.