In this paper, we derive some threshold conditions for permanence and extinction of diseases that can be described by a nonautonomous SEIRS epidemic model. Under the quite weak assumptions, we establish some sufficient conditions to prove the permanence and extinction of disease. Some new threshold values are determined.
机构:
Chongqing Univ Technol, Sch Math & Stat, Chongqing 400054, Peoples R ChinaChongqing Univ Technol, Sch Math & Stat, Chongqing 400054, Peoples R China
Lu, Guichen
Lu, Zhengyi
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Sichuan Normal Univ, Dept Math, Chengdu 610066, Peoples R ChinaChongqing Univ Technol, Sch Math & Stat, Chongqing 400054, Peoples R China
机构:
Univ Western Cape, Dept Math & Appl Math, Robert Sobukwe Rd, ZA-7530 Bellville, South AfricaUniv Western Cape, Dept Math & Appl Math, Robert Sobukwe Rd, ZA-7530 Bellville, South Africa