Some Americans will have to be on high alert for Zika virus.
There is at least one initiative, which George W. Bush started and Barack Obama has continued, that will endure as a bipartisan effort that helps define their legacies positively: America's role in drastically reducing malaria-related deaths in sub-Saharan Africa.
Health officials predict that a small number of Americans will get Zika virus.
Here's everything you need to know about the Zika virus.
The virus is suspected of causing birth defects and a rare autoimmune disorder.