Received: 28 April 2020
Accepted: 27 August 2020
First Online: 2 October 2020
Ethics approval and consent to participate
: Not applicable as the study does not involve the use of any animal or human samples.
: Agreement for publication.
: Xiao-Nong Zhou is an Editor-in-Chief of the journal <i>Infectious Diseases of Poverty</i>. He was not involved in the peer-review or handling of the manuscript. The authors have no other competing interests to disclose.