(CNN) The news out of Dallas in early February exploded around the world: Zika can be transmitted by sex. Suddenly, a virus that wasn't supposed to be a game changer in the United States took on a whole new dimension. It spurred the Centers for Disease Control and Prevention to add recommendations for safe sex to the already growing list of precautions needed to protect pregnant women from getting Zika and possibly infecting their unborn babies. But here's what is most startling: The Dallas case wasn't unique. The first known case of sexually acquired Zika in the United States actually occurred eight years ago in northern Colorado after a husband and wife reunion.First case of sexually acquired Zika was Colorado nearly a decade agoMicrobiologist Brian Foy got Zika in Africa and gave it to his wife when he returned 
 Question:While _, his wife and Kobylinski are listed as authors, their identities are disguised as Patient One, Patient Two and Patient Three to protect their privacy, something extremely important to Chilson Foy.
Brian Foy