Clinical manifestations of COVID-19 are varied in the general population. This study aimed
to systematize the literature regarding clinical manifestations of patients with confirmed …

Contact tracing is a non-pharmaceutical intervention (NPI) widely used in the control of the
COVID-19 pandemic. Its effectiveness may depend on a number of factors including the …

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 …

While the advanced diagnostic tools and healthcare management protocols have been
struggling to contain the COVID-19 pandemic, the spread of the contagious viral pathogen …

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 …

We analyse the time-series evolution of the cumulative number of confirmed cases of COVID-
19, the novel coronavirus disease, for some African countries. We propose a mathematical …

Background Coronavirus disease 2019 (COVID-19) has caused a large-scale global
epidemic, impacting international politics and the economy. At present, there is no …

In this paper we study different vaccination strategies that could have been implemented for
the early COVID-19 pandemic. We use a demographic epidemiological mathematical model …

Several publications on the concept and structure of SARS-CoV-2 and COVID-19 over the
past three years target medical and biomedical scientists, and rightly so, as experts in …

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 …