COVID-19 has become the largest pandemic in recent history to sweep the world. This study
is devoted to developing and investigating three models of the COVID-19 epidemic process …

In this research, we developed a coinfection model of tuberculosis and COVID-19 with the
effect of isolation and treatment. We obtained two equilibria, namely, disease-free …

Natural symmetry exists in several phenomena in physics, chemistry, and biology.
Incorporating these symmetries in the differential equations used to characterize these …

A mathematical deterministic model for the dynamics of Monkeypox disease is developed.
Monkeypox is a viral zoonotic disease that can be transmitted to humans, through contact …

The COVID-19 pandemic has highlighted the profound impact of the SARS-CoV-2 virus as a
significant threat to human health. There is an urgent need to develop a comprehensive …

COVID‐19 is a world pandemic that has affected and continues to affect the social lives of
people. Due to its social and economic impact, different countries imposed preventive …

In this study, an autonomous type deterministic nonlinear mathematical model that explains
the transmission dynamics of COVID‐19 is proposed and analyzed by considering …

Mathematical models have been an important tool during the COVID-19 pandemic, for
example to predict demand of critical resources such as medical devices, personal …

The present global health threat is the novel coronavirus disease (COVID-19), caused by a
new strain of the SARS-CoV-2 coronavirus. In this study, have employed optimal control …

The aim of this work is to study an over-dispersed SEIQR infectious disease and obtain
optimal methods of contact tracing. A prototypical example of such a disease is that of the …