The most widespread outbreak of the Zika virus in history is currently ongoing in the Americas. The outbreak began in April 2015 in Brazil, and subsequently spread to other countries in South America, Central America, and the Caribbean. The Zika virus, which is spread by mosquitos, has been causing birth defects in thousands of children.
The virus has 'explosive pandemic potential' according to two US scientists, who have encouraged the World Health Organisation to take urgent action against it. But what is the Zika virus, how did it spread, and how can people stay safe?