Plenty of questions remain about transmission and vaccine development
dpa picture alliance/Alamy
One of the top stories of 2016 quietly exited much of the public’s consciousness in 2017. But it’s still a hot topic among scientists and for good reasons. After Zika emerged in the Western Hemisphere, it shook the Americas, as reports of infections and devastating birth defects swept through Brazil and Colombia, eventually reaching the United States. In a welcome turn, the number of Zika cases in the hemisphere this year dropped dramatically in the hardest-hit areas.
But few scientists are naïve enough to think we’ve seen the last of Zika. “The clock is ticking for when we will see another outbreak,” says Andrew Haddow, a medical entomologist at the U.S. Army Medical Research Institute of Infectious Diseases in Frederick, Md.