Optimal control modelling of XEC SARS-CoV-2 variant with combined ELIXIR-COVID and ADSAK-COVID therapiesChristophe Kikmo Wilba, Simon Gnassiri, Bertin Sone Enone and Njifenjou AbdouInt. J. Simul. Multidisci. Des. Optim., 16 (2025) 28DOI: https://doi.org/10.1051/smdo/2025030