1 Alison M. Binder is an epidemiologist and Paige A. Armstrong is a medical epidemiologist in the Division of Vector-Borne Diseases at the Centers for Disease Control and Prevention, Atlanta. Contact author: Paige A. Armstrong, yzu9@cdc.gov. The authors have disclosed no potential conflicts of interest, financial or otherwise. The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.