The U.N. General Assembly will devote an entire day to the issue of superbugs and antibiotic resistance. Dr. Keiji Fukuda leads the WHO's work on the issue.
It's a country of booming urban centers and poor and lawless rural regions. A pending peace deal between the government and the guerrillas promises to end this divide.
Who's in charge? Which countries haven't paid their dues? Which president said he isn't coming this year? Take our quiz to see if you know the answers.
Last year the country was declared polio-free. Now there are three new cases. And Boko Haram militants are the biggest obstacle to getting rid of the virus.