Disaster Risk Reduction

Where did Zika virus come from?

Zika was first noticed in Africa, in Uganda's Ziika forest (yes it's spelled with two i's) in 1947. It spread slowly at first, and seemed to be a pretty harmless virus, causing hardly any symptoms at all in most people. But it picked up speed in around 2007 when it started spreading in the South Pacific and it showed up inBrazil in 2013, according to the latest research. Because hardly anyone in the Americas has immunity to Zika, it's spread explosively since then.

WASHINGTON (AP) — The Obama administration is to announce Wednesday it will transfer leftover money from the largely successful fight against Ebola to combat the growing threat of the Zika virus, congressional officials say.

Roughly 75 percent of the $600 million or so would be devoted to the Centers for Disease Control, which is focused on research and development of anti-Zika vaccines, treating those infected with the virus and combating the mosquitoes that spread it. The rest would go to foreign aid accounts to fight the virus overseas.

The officials spoke on condition of anonymity because they were not authorized to publicly discuss the matter before the White House announcement.

The Obama administration said Tuesday it will allow foreign nationals from Ebola-affected countries in West Africa to stay in the U.S. for another six months, even though global health officials said the outbreak that killed 11,000 people abroad is officially over.