Since the emergence of influenza A/H1N1 pandemic virus in March–April 2009, very stringent interventions including Fengxiao were implemented to prevent importation infected cases and decelerate disease spread mainland China. The extent which these measures have been effective remains elusive. We sought investigate effectiveness that may inform policy decisions on improving community-based for management on-going outbreaks China, particular during Spring Festival mid-February 2010 when...

The 2002-2003 SARS outbreaks exhibited some distinct features such as rapid spatial spread, massive media reports, andfast self-control. These were shared by the 2009 pandemic influenza and will be experienced other emerging infectiousdiseases. We focus on dynamic interaction of epidemic outbreak behavior change in population formulate a compartmental model, that tracks evolution human population. Such is characterized disease progression (susceptible, infected, hospitalized, recovered)...

Culling birds has always been an effective method to control the spread of avian influenza. Here, we introduce a Filippov avian-only model with culling both susceptible and infected birds. The Filippov-type is formulated by considering that no strategy taken if number less than threshold level [Formula: see text]; further, cull once exceeds meanwhile, text]. global dynamical behavior system, including existence stability various types equilibria, sliding mode its dynamics, together...

An SEIR type of compartmental model with nonlinear incidence and recovery rates was formulated to study the combined impacts psychological effect available resources public health system especially number hospital beds on transmission control A(H7N9) virus. Global stability disease-free endemic equilibria is determined by basic reproduction as a threshold parameter obtained constructing Lyapunov function second additive compound matrix. The results reveal that do not change steady states but...

Abstract Plants play a vital role in the everyday life of all organisms on earth. This paper proposes Filippov vector-borne plant disease model incorporating roguing infected plants and spaying pesticides to relieve economical devastation for growers damage humans, natural enemies environment. No control strategy is taken if number less than an threshold level $I_{c}$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>I</mml:mi> <mml:mi>c</mml:mi> </mml:msub>...

Abstract Depopulation of birds has been authenticated to be an effective measure in controlling avian influenza transmission. In this work, we establish a Filippov avian-only model incorporating threshold policy control. We choose the index—the maximum between infected level $I_{T}$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>I</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math> and product number susceptible S ratio value ξ —to decide on whether trigger control...

An immunological model of HIV-1 infection that accounts for antiretroviral drug uptake via explicit compartments is considered.Different from traditional methods where the effects modeled implicitly as a proportional inhibition viral and production, in this paper, it assumed CD4 + T cells can 'prey on' drugs become which cannot be infected or produce new virions.Drug dymamics applying impulsive differential equations.The basic reproductive number R 0 defined next operator.It shown with...

Objective To explore the characteristics of resilience and relationships between social integration disabled people. Methods By convenient sampling, a total 702 people were investigated by Connor-Davidson Resilience Scale, Social Integration Scale Disabled self-made general questionnaire. Results The score people(53.27±18.21) was lower than chinese community people(65.4±13.9, t=-13.19, P<0.01). The scores significantly who came from rural areas, younger(≤ 24 years old) or...

Objective To develop social integration scale of the disabled, and to test reliability validity scale. Methods 511 disabled persons were investigated by self-made Chinese version positive negative affect schedule(PANAS-C). Results The Scale was composed three factors: self integration, relationship affection they explained 47.39% variance. The theoretical model fit could be accepted(χ2/df=2.051, P<0.001; RMSEA=0.046; GFI=0.884; CFI=0.926; IFI=0.927). factors had significant...