Vol 1,

Issue 1 -

December,

2026

by Mohamed El Bachir¹, Ebenezer Maka Maka²˒³, Yannick Malong²˒³, Benjamin Garga⁴, Daouda Hassana Daouda¹, Hamadjam Abboubakar³˒⁵*
The Chikungunya virus, primarily transmitted by female Aedes aegypti and Aedes albopictus mosquitoes, poses a growing global public health challenge due to its debilitating symptoms and rapid spread. Recent outbreaks in Southeast Asia, South America, and Central and East Africa highlight the difficulty of accurately predicting epidemics, given the complex interactions among environmental, climatic, and biological factors. Traditional epidemiological surveillance systems often remain insufficient for early outbreak detection. This study applies advanced machine learning techniques, specifically ensemble regression, to develop predictive models of Chikungunya epidemics in Chad, Brazil, and Paraguay. Random Forest and XGBoost regressors optimized via Grid Search are combined within a Voting Regressor ensemble framework. The ensemble model demonstrated superior […] Read more at https://mjcellpress.com/article/mjmcs03/
by Albert Kouchéré Guidzavaï¹, Joseph Yangla², Hamadjam Abboubakar³⁴*, Gnodandi Kaakréo², Rubin Fandio⁵, Irépran Damakoa².
This study proposes and analyzes a mathematical model for the transmission dynamics of COVID-19, explicitly accounting for the ability of the immune system in some individuals to eliminate the virus before they become infectious. A compartmental Susceptible–Exposed–Asymptomatic–Symptomatic–Hospitalized–Recovered (SEAIHR) model is formulated using both classical integer-order derivatives and Caputo fractional-order derivatives. The model is first examined by establishing the positivity and boundedness of solutions, followed by the computation of the basic reproduction number R0. The existence of equilibrium points is proven, and the asymptotic stability of the disease-free equilibrium is analyzed when […] Read more at https://mjcellpress.com/article/mjmcs02/