Mathematical modelling of the impact of environmental contamination on Lassa fever: optimal control and economic analysisChinwendu Emilian Madubueze, Saheed Ajao, John Olajide Akanni, Zviiteyi Chazuka and Sunday Casmir MadubuezeEur. Phys. J. Plus, 140 7 (2025) 699DOI: https://doi.org/10.1140/epjp/s13360-025-06639-9