Rukshona Saidova, 12, lives with both HIV and tuberculosis. She can't walk right now because the diseases have atrophied muscles in her legs. Jason Beaubien/NPR hide caption

itoggle caption Jason Beaubien/NPR

Nurse Tina Martin checks on Orion Qurbonaliev, 4, who has tuberculosis. Orion's grandmother, Kholbibi Abdulloeva, also has TB. Jason Beaubien/NPR hide caption

itoggle caption Jason Beaubien/NPR

Oxana and Pavel Rucsineanu walk to the tuberculosis hospital in Balti, Moldova. Oxana and their new baby live in an apartment, but Pavel still has to stay at the TB ward, fighting for his life. Jason Beaubien/NPR hide caption

itoggle caption Jason Beaubien/NPR

Michelle Williams (center) and two daughters visit the grave of her mother, Judy Williams, at Fairview Cemetery in Hyde Park, Mass., on May 11. Judy died in 2011. Ellen Webber for NPR hide caption

itoggle caption Ellen Webber for NPR

Peter Piot was one of the co-discoverers of the Ebola virus in 1976. "I never thought we would see such a devastating and vast epidemic," he says. Leon Neal/AFP/Getty Images hide caption

itoggle caption Leon Neal/AFP/Getty Images

A woman walks with children at an orphanage in Addis Ababa, Ethiopia. Policymakers have long called for orphans to be taken out of institutions and placed with foster families, but one study from Duke University is challenging that notion. Sean Gallup/Getty Images hide caption

itoggle caption Sean Gallup/Getty Images

A Public Health Agency of Canada worker seen inside the National Microbiology Laboratory's Level 4 lab in Winnipeg. Public Health Agency of Canada/Nature hide caption

itoggle caption Public Health Agency of Canada/Nature

The orchids that produce vanilla beans have no natural pollinators in Madagascar; the plant must be pollinated by hand — a labor-intensive process with little margin for error. Courtesy of Madécasse hide caption

itoggle caption Courtesy of Madécasse

New Yorkers can take city-run classes to learn how to make their homes and businesses less attractive to these guys. Ludovic Bertron/Flickr hide caption

itoggle caption Ludovic Bertron/Flickr

A team of body collectors carry the corpse of a woman suspected of dying of Ebola in Monrovia, Liberia's capital. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

A technician tests samples from Ebola-infected patients at a field lab, run by Doctors Without Borders, in Kailahun, Sierra Leone. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

Hedson Lamour, 28, prays with his color-coordinated band before performing. He entered the contest because his mom was a child slave. Frederic Dupoux for NPR hide caption

itoggle caption Frederic Dupoux for NPR

Rice is just as nice as ice when it comes to bucket challenges. Right: Manju Latha Kalanidhi, creator of the Rice Bucket Challenge, gives grains to a hard-working neighbor. Courtesy of Manju Latha Kalanidhi hide caption

itoggle caption Courtesy of Manju Latha Kalanidhi

Shops are closed in Monrovia's West Point neighborhood as part of a quarantine to contain the spread of Ebola. Zoom Dosso/AFP/Getty Images hide caption

itoggle caption Zoom Dosso/AFP/Getty Images