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 …

The current novel Coronavirus Disease 2019 (COVID-19) is a multistage epidemic
consisting of multiple rounds of alternating outbreak and containment periods that cannot be …

Machine learning (ML)-based prediction is considered an important technique for improving
decision making during the planning process. Modern ML models are used for prediction …

From the beginning of the outbreak of SARS-CoV-2 (COVID-19), South African data
depicted seasonal transmission patterns, with infections rising in summer and winter every …

When a public health event occurs, it is very difficult to guarantee a stable supply of
emergency medical supplies; this has a great impact on the efficiency of emergency rescue …

Objectives: Waves of epidemics associated with Omicron variant of Coronavirus Disease
2019 (COVID-19) in major cities in China this year have been controlled. It is of great …

During the recent COVID‐19 pandemic, quarantine and testing policies have been of vital
importance since the causative agent has been a novel virus and no vaccine was developed …

The severity of the COVID-19 pandemic requires a better understanding of the spread of
SARS-COV2. As of December 2019, several mathematical models have been developed to …

COVID-19 has been spreading widely since January 2020, prompting the implementation of
non-pharmaceutical interventions and vaccinations to prevent overwhelming the healthcare …

In this paper, the unknown parameters of a SEIRS mathematical model for the dynamics of
COVID-19 are estimated by the least squares approach using data of Trkiye. In the …