Dr. Margaret Chan is director-general of the World Health Organization. In her first major address on Zika, delivered Thursday in Geneva, she said: "Questions abound. We need to get some answers quickly."
U.S. health officials are telling pregnant women to avoid travel to Latin America and Caribbean countries with outbreaks of Zika, a tropical illness linked to birth defects.
The FDA worries that the same alkaline treatment that gives corn masa its distinctive aroma and flavor might also prevent folic acid from remaining stable in masa. The agency is currently reviewing test results looking at the question of stability.
Verónica Zaragovia for NPR
Health inspectors collect samples of mosquito larvae from standing water in a garden in a middle-class neighborhood in the north of Rio de Janeiro. They are searching for places where the Aedes aegypti mosquito breeds — that's the one that carries Zika virus.
Omar looks through Kai's photo book. The charges for the infant's six months of care in the neonatal intensive care unit totaled about $11 million, according to the family, though their insurer very likely negotiated a lower rate.
Heidi de Marco/KHN
Dr. Frances O. Kelsey of the U.S. FDA, who is credited with keeping the birth-deforming drug, Thalidomide, off the U.S. market, is shown in an Aug. 1962 photo. Kelsey died on Friday at age 101.