Funding for this research was provided by:
National Institute of Allergy and Infectious Diseases (R21AI104513)
Received: 10 August 2018
Accepted: 13 January 2019
First Online: 30 January 2019
Ethics approval and consent to participate
: The household survey was approved by the Colorado Multiple Institutional Review Board and the Khon Kaen University Ethics Committee. Informed consent was obtained from all participants prior to completing the survey.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.