A Kind of Time-Delayed COVID-19 Dynamical Model with Vaccination

The Dynamical Analysis of a Delayed Prey-Predator Model with a Refuge-Stage Structure Prey Population

A mathematical model describing the dynamics  of a  delayed  stage structure prey - predator  system  with  prey  refuge  is  considered.  The  existence,  uniqueness  and bounded- ness  of  the  solution  are  discussed.    All  the  feasibl e  equilibrium  points  are determined.  The   stability  analysis  of  them  are  investigated.  By  employ ing  the time delay as the bifurcation parame...

Promote COVID-19 vaccination uptake: a letter to editor

Covid-19 Vaccination and Reactivation of Varicella Zoster Virus

Introduction: After COVID-19 pandemic in 2020 that mostly affects upper respiratory tract, the scientists investigated an effective vaccine against the virus. As the vaccination of general population started some patients were visited with varicella zoster virus activation following the COVID vaccine.

A Delayed Epidemic Model with Pulse Vaccination

A delayed SEIRS epidemic model with pulse vaccination and nonlinear incidence rate is proposed. We analyze the dynamical behaviors of this model and point out that there exists an infectionfree periodic solution which is globally attractive if R1 < 1, R2 > 1, and the disease is permanent. Our results indicate that a short period of pulse or a large pulse vaccination rate is the sufficient condi...

Explanation of the experiences of reluctance towards vaccination against COVID-19: A qualitative study

Background and Aims: The COVID-19 disease has become a global problem and its prevention through vaccination has led to a reduction in the damage and human casualties at the time of its occurrence. Recognition of the factors that affect the acceptance of vaccination, identification of the barriers, and facilitation of decision-making in the field of vaccination are important aspects of designin...