The virus, which is now spreading more rapidly than previously thought, is expected to affect most of the world’s regions, and potentially even some of the United States.
While there is no specific date set for its first-ever pandemic, the US has been hit hardest by the virus.
As of June 25, more than 1,400 confirmed cases of Zika had been reported, including more than 2,000 in the US.
There have been three major outbreaks of the virus in the country: one in Dallas, Texas, which resulted in at least 1,000 cases; a second in San Antonio, Texas; and a third in Florida.
The latest figures from the Centers for Disease Control and Prevention (CDC) also show that the virus is spreading faster than at any time since the start of the pandemic.
Read more about the Zika virus and its impact on the US here.
The US is still in the midst of a severe outbreak of dengue, which has killed more than 100 people.
The virus has spread through the country in unprecedented numbers, and in the latest data, more people in the United Kingdom are now infected with the virus than in the entire United States combined.