Aid workers racing to defeat Ebola before the rains come

Aid workers are rushing into neighboring Guinea to try to stanch a worrisome rise in cases of the deadly Ebola virus, which has been slowed in Sierra Leone and been all but eradicated here.

The mission is urgent because the coming rainy season could hamper travel to remote villages where the disease continues to emerge.

"I'm nervous but optimistic at heart that Guinea will follow the same trajectory" as Liberia and Sierra Leone where the disease has declined, said Jordan Tappero, director of the division of global health protection for the Centers for Disease Control and Prevention (CDC).

"We've tripled the number of people we have in the field (in Guinea) and many other organizations are doing the same," he said. "We've got to