Since the outbreak of COVID‐19 in December 2019, the severe acute respiratory syndrome
coronavirus 2 (SARS CoV‐2) has spread worldwide. This study summarized the …

In this paper, we study the effectiveness of the modelling approach on the pandemic due to
the spreading of the novel COVID-19 disease and develop a susceptible-infected-removed …

Background Many popular disease transmission models have helped nations respond to the
COVID-19 pandemic by informing decisions about pandemic planning, resource allocation …

In this paper, we consider a modified SIR (susceptible-infected-recovered/removed) model
that describes the evolution in time of the infectious disease caused by Sars-Cov-2 (Severe …

This paper assesses the quantitative impact of government interventions on deaths related
to the first COVID-19 outbreak. Using daily data for 32 countries and relying on the …

The fourth year of the COVID-19 pandemic without decreasing trends in the global numbers
of new daily cases, high numbers of circulating SARS-CoV-2 variants and re-infections …

The study explores the dynamics of a COVID-19 epidemic in multiple susceptible
populations, including the various stages of vaccination administration. In the model, there …

COVID-19 is an infectious disease caused by the SARS-CoV-2 virus that caused an
outbreak of typical pneumonia first in Wuhan and then globally. Although researchers focus …

In this paper, a susceptible-infected-removed (SIR) model has been used to track the
evolution of the spread of COVID-19 in four countries of interest. In particular, the epidemic …

Two different approaches to incorporate environmental perturbations in stochastic systems
are compared analytically and computationally. Then we present a stochastic model for …