At the end of 2019, a new disease recognized such as severe acute respiratory syndrome
(SARS), was reported in Wuhan, China. This disease was caused by an unknown SARS …

Multiobjective multitasking evolutionary algorithms have shown promising performance for
tackling a set of multiobjective optimization tasks simultaneously, as the optimization …

Several SARS-CoV-2 variants have emerged around the world, and the appearance of other
variants depends on many factors. These new variants might have different characteristics …

COVID-19 is an infectious disease that kills millions of people each year and it is a major
public health problem around the globe. The current COVID-19 situation is still now …

The aim of this paper is to investigate the qualitative behavior of the COVID-19 pandemic
under an initial vaccination program. We constructed a mathematical model based on a …

A model of a COVID-19 epidemic is used to predict the effectiveness of vaccination in the
US. The model incorporates key features of COVID-19 epidemics: asymptomatic and …

Over the course of the COVID-19 pandemic millions of deaths and hospitalizations have
been reported. Different SARS-CoV-2 variants of concern have been recognized during this …

Vaccination against the coronavirus disease 2019 (COVID-19) started in early December of
2020 in the USA. The efficacy of the vaccines vary depending on the SARS-CoV-2 variant …

We propose two different mathematical models to study the effect of immigration on the
COVID-19 pandemic. The first model does not consider immigration, whereas the second …

The SARS-CoV-2 continues to spread across the world. During this COVID-19 pandemic,
several variants of the SARS-CoV-2 have been found. Some of these new variants like the …