Text and Data Mining valid from 2019-10-07
Received: 18 March 2019
Accepted: 28 August 2019
First Online: 7 October 2019
Ethics approval and consent to participate
: All of the data employed in this study were generated during emerging outbreak investigations and are openly available. Data are deemed exempt from institutional review board assessment.
: Not applicable
: The authors declare that they have no competing interests.