Submitted on: 04 February 2020.
Revised on: 04 March 2020.
Accepted on: 15 March 2020.
___________________Infectious Disease Reports---MDPI
Submitted on: 22 July 2018.
Revised on: 22 August 2018.
Accepted on: 17 October 2018.
___________________Infectious Disease Reports---MDPI
http://reply.papertrans.cn/2/125/12500/12500-23.png
http://reply.papertrans.cn/2/125/12500/12500-24.png
Submitted on: 21 December 2020.
Revised on: 04 April 2021.
Accepted on: 15 April 2021.
___________________Infectious Disease Reports---MDPI
http://reply.papertrans.cn/2/125/12500/12500-26.png
Submitted on: 21 February 1999.
Revised on: 06 April 1999.
Accepted on: 24 May 1999.
___________________Infectious Disease Reports---MDPI
Submitted on: 01 February 2006.
Revised on: 11 May 2006.
Accepted on: 30 May 2006.
___________________Infectious Disease Reports---MDPI
Submitted on: 09 April 2013.
Revised on: 09 May 2013.
Accepted on: 08 July 2013.
___________________Infectious Disease Reports---MDPI
http://reply.papertrans.cn/2/125/12500/12500-30.png