Charsey Cole Porse
, Sharon Messenger, Duc J. Vugia, Wendy Jilek, Maria Salas, James Watt, and Vicki Kramer
Figure 1. Number of human Zika virus infections in residents, by month and year of onset and country of travel (top 10 countries shown), California, USA, October 1, 2015–September 1, 2017. Month was determined by date of symptom onset for symptomatic persons or specimen collection date for asymptomatic persons.