Funding for this research was provided by:
Guizhou Science and Technology Department (Qian Ke He (2016)4021; Qian Ke He Platform talent 5606; Qian Ke He Platform talent 5627)
Received: 17 December 2019
Accepted: 12 August 2020
First Online: 24 August 2020
Ethics approval and consent to participate
: These clinical samples used in this study were not specifically isolated for this research. They were part of the routine CDC (Center for Disease Control and Prevention) laboratory procedure in China. The National Health and Family Planning Commission of China determined that the collection of data from human cases of infectious disease was part of continuing public health surveillance of a notifiable infectious disease and was exempt from institutional review board assessment. All data were supplied and analyzed in an anonymous format, without access to personal identifying information. Therefore, the need for consent was deemed unnecessary.
: Not applicable.
: All the authors listed in the paper declare that they have no competing interests for publication of this paper.