One of the most gratifying parts of my job as CEO of the Bill & Melinda Gates Foundation

is watching the successes we achieve year by year add up to our big 10- and 20-year goals. The ritual of putting together the annual report helps me reflect on how impact accumulates over time.

In 2005, for example, we wrote about the recent phase I trials for a new vaccine for meningitis, one of the most dreaded diseases in the world.

One of my key goals as CEO of the Bill & Melinda Gates Foundation is improving how we work together. By that, I mean how we work as a team within the foundation and how we work with our larger team of partners to build better lives for the people we serve.

In the year since I wrote my last annual letter, I’ve made some important changes at the foundation—changes that will help all of us maximize the impact of our work together.

One of my key goals as CEO of the Bill & Melinda Gates Foundation is improving how we work together. By that, I mean how we work as a team within the foundation and how we work with our larger team of partners to build better lives for the people we serve.

In the year since I wrote my last annual letter, I’ve made some important changes at the foundation—changes that will help all of us maximize the impact of our work together.