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In 2020, health care has had to pivot dramatically to keep up with the havoc created by the pandemic. COVID-19 and its aftermath are about the basics, including in medicine.

Background: Vitamin D has diverse and extensive effects on the immune system, including activating innate immunity and reducing the overactive adaptive immune response. A systematic review was performed to identify and synthesize the best available…

Coronavirus disease 2019 (COVID-19) is an infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). It has spread globally, resulting in an ongoing pandemic. Real-time reverse transcription-polymerase chain reaction…

The outburst of the COVID-19 pandemic has raised several questions leading to a complex system in terms of modeling. Indeed, the modeling of the epidemic, at the level of a country, needs considering each of the different sources of contamination as…

In late December 2019, a new kind of Coronavirus, called COVID19, was reported from Wuhan, China. By the fast spread of the virus in China and then in all countries, the people around the world have been deeply frightened. The World Health…

Background: A few studies compared the epidemiologic features of the first and second waves of coronavirus disease 2019 (COVID-19) outbreak. This research was carried out to compare the 1st and the 2nd waves of the epidemics in the northern Iran.…

This study aims to investigate the existence of herding behaviour during COVID-19 crisis in the Egyptian stock market by using firm-level data and employing different testing methodologies. The study also investigates the existence of herding…

The purpose of this study is to identify the dependence of the impact of the pandemic on changes in the regulation of labor relations in the educational sector. At present, serious changes have taken place not only in our country, but also in the…

BACKGROUND AND AIM: Given the prevalence of novel coronavirus disease 2019 (COVID-19) and the lack of information on coronavirus and pregnancy, the purpose of this study was to evaluate the association of COVID-19 and perinatal outcomes in pregnant…