The World Health Organisation is calling for greater co-ordination between agencies trying to combat the spread of the Zika virus.

In a new report, the W.H.O. said 39 countries, mainly in Latin America and the South Pacific, have now reported cases of the virus.

The disease, which is spread by mosquitos and sexual contact, is linked to a rise in birth defects in affected countries.

Brazil is today launching three days of "Action Against Zika".

More than 200,000 troops will hand out leaflets to educate people on how best to protect themselves against the disease.