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To assess the temporal dynamics of Middle East respiratory syndrome coronavirus (MERS-CoV) infection in dromedary camels, specimens were collected at 1–2 month intervals from 2 independent groups of animals during April 2013–May 2014 in Al-Ahsa…

The study's objective is to evaluate the impact of environmental sustainability rating, financial development, changes in the price level and carbon damages on the new COVID-19 cases in a cross-sectional panel of 17 countries. The study developed two…

The emergence of an unprecedented pandemic SARS-COV-2 caused perplexed in the medical community because of a high infection rate and rising mortality among COVID-19 patients. Till now, there is no particular treatment for the disease; nevertheless,…

Background: The COVID-19 pandemic is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). At the time of writing, neither a cure nor a vaccine has been approved by the World health organization (WHO) for this disease. Given the…

This work investigates the optimal control of the second phase of the COVID-19 lockdown in Morocco. The model consists of susceptible, exposed, infected, recovered, and quarantine compartments (SEIRQD model), where we take into account contact…

Background: COVID-19[1] is a new infectious disease that has been declared by WHO[2]  as a public health emergency worldwide due to its rapid spread to China and then to other parts of the world. The present study was designed to evaluate the…

The world is witnessing a major public health crisis in the wake of the third coronavirus strain pandemic, a novel coronavirus (severe acute respiratory syndrome coronavirus 2). Although initially thought to be a pure respiratory pathogen, recent…