Emerging research suggests that preexisting immunity to dengue virus, which is endemic in South America, could make a subsequent Zika infection worse.
Emerging diseases on which the experts are keeping a close eye.
In the future, consumers in the developed world could choose to purchase products from the companies that do the most to promote global health.
A computer model suggests that while more cases of Zika can be expected in the continental U.S. outbreaks will probably be small and are not projected to spread.
What could we do if a real-life zombie disease started to spread?
The chance the someone at the Rio games will import the virus to their home country is low.