Local officials burn chicken coops in anticipation of a resurgence in bird flu in Jakarta, Indonesia, in January. Concerns about potential misuse of research into genes that control the contagiousness of flu have stymied publication. Tatan Syuflana/AP hide caption
Here goes nothing. A big jump over the Zambezi River in Africa. James Whatley/Flickr hide caption
Afghan refugee Shafiq Mohammed, 9, and other children look for items of use on the outskirts of Islamabad, Pakistan, in December. Muhammed Muheisen/AP hide caption
What do you say we go get HIV tested together? iStockphoto.com hide caption
Chickens were killed in Hong Kong last December in an effort to halt the spread of the deadly H5N1 strain of bird flu. Aaron Tam/AFP/Getty Images hide caption
A competitor stops for a cigarette after he broke down during the Enduropale race at Le Touquet Beach on February 22, 2009 in Le Touquet, France. Paul Gilham/Getty Images hide caption
U.S. Secretary of Health and Human Services Kathleen Sebelius (center) talks to a health worker during a visit to Eliazar Germain hospital in Port-au-Prince, Haiti, on Monday. It's Sebelius' first visit to the country. Ramon Espinosa/AP hide caption
Rice farmer Alexi Rochnel shows his blank cholera vaccination card. April is the beginning of Haiti's rainy season, which will likely intensify Haiti's cholera outbreak. John W. Poole/NPR hide caption
A makeshift latrine hangs over the water at the edge of Cite de Dieu, a slum in Port-au-Prince, Haiti. John W. Poole / NPR hide caption
Rice farmer Alexi Rochnel shows his blank cholera vaccination card. April is the beginning of Haiti's rainy season, which will likely intensify Haiti's cholera outbreak. John W. Poole / NPR hide caption
Marlene Lucien controls the hose that fills people's plastic buckets on one busy street corner in Port-au-Prince, Haiti. John Poole/NPR hide caption
An electron microscope view of the bird flu virus. PR Newswire hide caption
A micrograph shows red blood cells infected by the malaria parasite Plasmodium falciparum. John C. Tan/AP hide caption
A young girl bathes in an irrigation canal. The canal and nearby river are the primary sources of water for most people who live in the country around Saint-Marc, Haiti. John W. Poole/NPR hide caption
Dr. Jim Yong Kim is introduced as the new president of Dartmouth College in Hanover, N.H., in 2009. Jim Cole/AP hide caption