For decades, Zika was considered a mild virus that rarely made people ill. Suddenly it seems to be causing serious problems and is spreading across the Americas. Here's the latest news.
A pediatric hospital in Houston is opening a new biocontainment wing — the first in the U.S. designed for children. Kids will even get dolls sporting mini versions of "spacesuits" doctors wear.
The first of two nurses who became infected after treating an Ebola patient at a Dallas hospital will be moved to a "high-level containment" facility at the National Institutes of Health in Maryland.
The World Health Organization warns of more than 20,000 cases by early November if help doesn't arrive quickly in West Africa. The CDC projects 1.4 million cases by late January.
The WHO has called for donations to help contain the outbreak. But money is just the first step. The challenges run from finding the right staff to prepping neighboring countries just in case.