The emergence of Zika virus in late 2015 in Brazil will likely cause lower attendance of the Olympics there this year. An article in Genetic Engineering and Biotechnology News for February 2016 said that recent studies by scientists from the University of Wisconsin – Madison and Universidad Sucre in Columbia have verified that Zika. Virus has reached Columbia. Recent TV news has reported that the virus has already infected several persons returning to the US. The CDC Is warning travelers going to and from Brazil to abstain from sex. Zika in a pregnant woman can cause birth defect, a small head and underdeveloped brain.