Between November 2015 and May 2018, Brazil's health ministry registered more than 3 000 cases linked to Zika infections during pregnancy
The causal link between Zika and foetal abnormalities has been confirmed.
Scientists have confirmed that the virus causes microcephaly.
Cape Verde, which recorded 22 suspected cases of Zika in the first week of March alone, has reported its first case of microcephaly.
Where did the Zika virus come from, and just how closely linked to microcephaly is it? SA's National Institute for Communicable Diseases explains all.