Background The coronavirus disease 2019 (COVID-19) epidemic, considered as the worst
global public health event in nearly a century, has severely affected more than 200 countries …

The study of the spatial differentiation of COVID-19 in cities and its driving mechanism is
helpful to reveal the spatial distribution pattern, transmission mechanism and diffusion …

The world experienced the life-threatening COVID-19 disease worldwide since its inversion.
The whole world experienced difficult moments during the COVID-19 period, whereby most …

In this paper, we investigate a fractal-fractional-order mathematical model with the influence
of hospitalized patients and the impact of vaccination with fractal-fractional operators. The …

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 …

The viruses has spread globally and have been impacted lives of people socially and
economically, which causes immense suffering throughout the world. Thousands of people …

Abstract During the period of 2019–20, forecasting was of utmost priority for health care
planning and to combat COVID-19 pandemic. Almost everyone's life has been greatly …

HIGHLIGHTS The fuzzy approach shows that intervention measures impede the spread of
COVID-19. Even with the vaccine, the infection rate could be worse if safety measures are to …

Purpose The COVID-19 pandemic has spread widely through the world. Most countries
impose severe intervention measures to contain the spread of the virus, and this worldwide …

The rapid spread of the Coronavirus disease (COVID-19) has demanded studies and
research works from many areas of knowledge, searching for treatments, vaccines and …