WILLEMSTAD - The world health organization warns of a new viral disease that is dangerous for pregnant women. This became clear from a study that was published in the journal Science Advances.

It is Rift Valley Fever (RVF). The disease virus is transmitted by various types of mosquitoes, including the tiger mosquito.

Symptoms of rift valley are fever, dizziness, headache, muscle pain and nausea. Healthy people who are not pregnant are less at risk of complications. But, when women are pregnant, the virus can be fatal, at least for the fetus. This is shown by the recent study in which rats were used as laboratory animals. The fetus died in 65 percent of the infected animals.