Zika virus is not something new which has emerged in the American countries in the past couple of years. Rather, this virus is discovered by the modern science almost before 1947 and it is strictly believed that the presence of this virus existed even before that. However, the reasons for its re-emergence in the south Asian countries and then to America is not known clearly to anyone.
The symptoms of the Zika virus are similar to many other diseases. For this reason, people are not able to recognize it very soon as they get infected.