At the health clinic in Minjibir, Nigeria, a child is immunized for polio. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

The outbreak of Middle East respiratory syndrome is slowing down in South Korea, but people were still wearing surgical masks around Seoul on Monday. Ed Jones/AFP/Getty Images hide caption

itoggle caption Ed Jones/AFP/Getty Images

Airport guards go on patrol wearing masks at Gimpo International Airport in Seoul on Friday. South Korea has announced one more death, but no new cases of the Middle East Respiratory Syndrome coronavirus. Kyodo/Landov hide caption

itoggle caption Kyodo/Landov

A police officer guards the home of a family under a 21-day Ebola quarantine in Freetown, Sierra Leone, back in March. Michael Duff/AP hide caption

itoggle caption Michael Duff/AP

Schoolgirls in Ethiopia examine a new feminine product: underwear with a pocket for a menstrual pad. Courtesy of Be Girl Inc. hide caption

itoggle caption Courtesy of Be Girl Inc.

A dangerous nuzzle? A man in western Abu Dhabi hugs a camel brought in from Saudi Arabia for beauty contests. Middle East respiratory syndrome circulates in camels across the Arabian Peninsula. Dave Yoder/National Geographic hide caption

itoggle caption Dave Yoder/National Geographic

Raymond Wang, 17, of Vancouver, celebrates winning first place at the Intel International Science and Engineering Fair in Pittsburgh, May 15. Courtesy of Kathy Wolfe/Intel hide caption

itoggle caption Courtesy of Kathy Wolfe/Intel

Simon Clements, left, and Steve Williams with their 6-month-old daughter, Sophie, in London. The two British men began the process of finding a surrogate mother more than two years ago. While legal in the U.K., the practice of surrogacy is tightly restricted. Ari Shapiro/NPR hide caption

itoggle caption Ari Shapiro/NPR

A woman on a street in Seoul checks her cellphone. The government is ramping up efforts to control an outbreak of the Middle East respiratory syndrome by monitoring the smartphones of those under quarantine. Ed Jones/AFP/Getty Images hide caption

itoggle caption Ed Jones/AFP/Getty Images

A woman smokes a cigarette in a Beijing shopping market, even though the practice is now banned inside public spaces. Kevin Frayer/Getty Images hide caption

itoggle caption Kevin Frayer/Getty Images