World Health Organization (WHO) predicts, three to four million people could be infected with Zika virus in the Americas this year. Most will not develop symptoms, but the virus, spread by mosquitoes, has been linked to brain defects in babies.
WHO Director General Dr Margaret Chan said Zika had gone from a mild threat to one of alarming proportions. She has set up a Zika emergency team after the explosive spread of the virus. It will meet on Monday to decide whether Zika should be treated as a global emergency. The last time an international emergency was declared was for the Ebola outbreak in West Africa, which has killed more than 11,000 people.