Still, the virus remains "a highly significant and long term problem," according to the world health body.
Do we know enough about Zika to begin giving out public health advice about pregnancy?
Should you travel to Latin America with the Zika virus raging? Should you buy mosquito netting now. Science writer Karen Weintraub answers frequently asked questions.
There are only six countries in the world that ban abortion under any circumstances. Four of them are in Latin America and the Caribbean.
The triple-whammy of mosquito-borne illnesses — the Zika virus, dengue fever and chikungunya — has pushed Brazil’s universal healthcare system beyond its already stretched capacity at a time when there is little money to shore it up. In the state of Pernambuco, the scope of the epidemics is stunning: Reported mosquito-borne illnesses rose from 20,000 in 2014 to 150,000 in 2015.
Last week, Across Women's Lives photographer Anne Bailey spent time at a rehabilitation clinic in Recife, Brazil, for babies with microcephaly. She took portraits of a few of them with their parents.
Germana Soares' three-month-old son Guilherme has microcephaly. But she's determined to give him a normal life.
Parents of children with microcephaly in Brazil are now finding each other via the social media platform WhatsApp. Brazilians doctors and scientists also credit the platform for helping them quickly understand the scope of the burgeoning epidemic of birth defects.
The mosquito that carries the Zika virus also carries dengue and other deadly diseases. So research into how to kill or alter the mosquito population is crucial in Brazil.
President Barack Obama is getting out in front of the fight against the Zika. He's asked Congress for emergency funding to combat the mosquito-borne virus. The money could speed the development of a vaccine, and a much needed diagnostic test for Zika.
With no end to the outbreak in sight, Zika has become a part of the five-day celebrations. Mosquito costumes have featured heavily in parades across the country. Health officials handed out paper fans with information about how to avoid the virus. And some pregnant women did what was once unthinkable in a nation known for its celebratory spirit — they stayed home.