2011 Annual Letter from Bill Gates: Infographics

		Sustained Polio by Country On a world map, track the reduction in countries with sustained transmission of polio.

		Polio Cases Per Year Follow the estimated number of polio cases per year, from 1988.

		Polio Timeline From Egyptian paintings in 3000 BC to the status of polio today, track landmarks in the polio timeline.

		The Rise in Vaccine Coverage Vaccines are the most effective and cost-effective health tool ever invented. Track their coverage.

		The Correlation Between Low IQ and High Level of Disease Although an IQ test is not a perfect measure, note the correlation between IQ and disease burden.

		Education Rankings Around the World See how the United States matches up in math, reading, and science.