Manny Alvarez, M.D., serves as Fox News Channel’s senior managing health editor. He also serves as chairman of the Department of Obstetrics/Gynecology and Reproductive Science at Hackensack University Medical Center. In this article, Dr. Manny discusses the Zika virus, which was the most talked about disease last year. In 2016, the United States saw more than 5,000 cases of Zika and thousands more in American territories. This year, health officials have not yet seen a major outbreak.