The World Health Organization has warned the mosquito-borne Zika virus will likely reach nearly all of North and South America.<br />The WHO explained in a statement Monday that the virus - which has been linked to birth defects - is set to spread across the Americas because the populations have not been exposed to the virus before.<br />The statement said "Zika virus will continue to spread and will likely reach all countries and territories of the region where Aedes mosquitoes are found" - that includes all of the Americas except Canada and Chile.<br />Zika has already reached 21 territories and countries in North and South America.<br />As well as causing headaches, fever and conjunctivitis, it has been suspected of contributing to a surge in birth defects that causes babies to be born with uncommonly small heads.
