Kitibe, 26, has recovered from Ebola and was ready to go home. Then the hospital told him he might have TB. Anders Kelto/NPR hide caption
Avian influenza, or bird flu, causes an infectious and contagious respiratory disease. In the lab, several scientists have made the H5N1 strain more contagious, a controversial line of research. James Cavallini/ScienceSource hide caption
Ebola Virus, Transmission Electron Micrograph Of The Ebola Virus, Rna Virus, Cause Of Hemorrhagic Fever. BSIP/UIG via Getty Images hide caption
Members of the California Nurses Association rallied in Sacramento, Calif., in May, in anticipation of contract negotiations with Kaiser Permanente that began in this fall. April Dembosky / KQED hide caption
One rationale for extending Medicaid coverage to more people is to help them get to a doctor or clinic before a minor illness becomes a medical emergency. iStockphoto hide caption
After beating Ebola, young Ibrahim celebrated by proposing to his nurse. Anders Kelto/NPR hide caption
A view of the rewards screen on the Mango Health app. Meredith Rizzo/NPR hide caption
Ron Klain (left), then chief of staff for Vice President Joe Biden, talks with Sen. Sheldon Whitehouse on Capitol Hill in December 2009. Jonathan Ernst/Reuters/Landov hide caption
When people see charts like this, they think the drug is more effective than if they just read about the data, a study finds. Source: Cornell University hide caption
A technician opens a vessel containing women's frozen egg cells in April 2011 in Amsterdam. AFP/Getty Images hide caption
World Bank President Jim Yong Kim wants the international community to step up its response to Ebola. J. Scott Applewhite/AP hide caption
Nina Pham, 26, steps off a plane Thursday night at a municipal airport in Frederick, Md. An ambulance was waiting to take her to the National Institutes of Health in Bethesda, Md. Paul J. Richards/AFP/Getty Images hide caption
A doctor uses a microscrope to view a human egg during in vitro fertilization (IVF), which is used to fertilize eggs that have been frozen. Mauro Fermariello/ScienceSource hide caption
Would you think twice about that 20-ounce soda if you were informed that it would take 5 miles of walking — or 50 minutes of running — to burn it off? Justin Sullivan/Getty Images hide caption
An ambulance carrying Amber Vinson, the second health care worker to be diagnosed with Ebola in Texas, arrives at Emory University Hospital in Atlanta on Wednesday. David Tulis/AP hide caption
At a CDC training session for clinicians headed to West Africa, a medical worker practices sanitizing hands after drawing blood from a mannequin portraying an Ebola patient. Brynn Anderson/AP hide caption
A man walks past the former site of a clinic that offered abortions in El Paso, Texas. Juan Carlos Llorca/AP hide caption
