The Zika Virus is an infectious disease that is spread through the bite of mosquitoes. Those who are bitten by the insects carrying this disease may develop a range of systems. Most of the time, this will only last for about seven days. While this doesn't sound too terrible, the real danger comes from infection while a woman is pregnant. It can cause microcephaly (abnormal smallness of the head, a result of incomplete brain development) and other types of brain malformations in babies. In some adults, it has also been connected with Guillain-Barre syndrome ( muscle weakness).