Stochastic Reaction Network Modeling and Optimal Control for Covid-19

In this paper, we aim to build and study a stochastic SEIRS model with vaccination in which we consider two types of infected: undetected and confirmed. The latter are hospitalized and receive treatment. We also derive the Hamilton Jacobi Bellman (HJB) equation by using dynamic programming tools, and we study it from theoretical and numerical points of view. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

[Impact of the COVID-19 pandemic on the activities of the cardiology department of the Ignace Deen National Hospital at the Conakry University Hospital]. / Impact de la pandémie de COVID-19 sur les activités du service de cardiologie de l'hôpital national Ignace Deen du CHU de Conakry.

The new coronavirus pandemic (COVID-19) is the main global health crisis of our time and the greatest threat we have faced in this century. According to the National Health Security Agency (ANSS), which is the national body responsible for managing epidemics and pandemics, 1927 cases of COVID-19 were confirmed, 11 deaths with more than 4000 contact subjects. The objective of this study was to assess the impact of the COVID-19 pandemic on the activities of the cardiology department of the Ignace Deen National Hospital at the Conakry University Hospital. This was a descriptive retrospective study from January 2020 to April 2020, focusing on consultation and hospitalisation activities in the cardiology department of Ignace Deen National Hospital at Conakry University Hospital. The study consisted of assessing the impact of the pandemic on patient use of the service during the first weeks of the pandemic. We recorded the frequency of consultations and hospitalisations from March to April 2020, which we compared to the frequency of consultations and hospitalisations in January and February 2020. During this study from March to April 2020, we identified 130 patients in consultation against 450 patients for the two months preceding the official declaration of the pandemic in Guinea, a drop of 71.1% (320 patients). The same remark was made in hospitalisation with a drop of 75% (35 patients against 140 for the two months preceding the pandemic). At the start of the COVID-19 pandemic in Guinea, it is clear that there has been a rapid and significant drop in the effective use of the cardiology service.