Submitted on: 24 August 2018.
Revised on: 07 October 2018.
Accepted on: 26 October 2018.
___________________Epidemics---ELSEVIER
Submitted on: 05 May 2016.
Revised on: 27 August 2016.
Accepted on: 07 October 2016.
___________________Epidemics---ELSEVIER
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Submitted on: 21 February 2020.
Revised on: 05 May 2020.
Accepted on: 03 June 2020.
___________________Epidemics---ELSEVIER
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Submitted on: 19 January 2010.
Revised on: 21 April 2010.
Accepted on: 09 May 2010.
___________________Epidemics---ELSEVIER
Submitted on: 25 January 2007.
Revised on: 19 April 2007.
Accepted on: 01 May 2007.
___________________Epidemics---ELSEVIER
Submitted on: 25 May 2007.
Revised on: 14 August 2007.
Accepted on: 06 October 2007.
___________________Epidemics---ELSEVIER
Submitted on: 13 July 2019.
Revised on: 17 September 2019.
Accepted on: 03 November 2019.
___________________Epidemics---ELSEVIER
Submitted on: 09 February 2021.
Revised on: 23 March 2021.
Accepted on: 15 May 2021.
___________________Epidemics---ELSEVIER