The asymptotic stability of an epidemiological model "covid 19 variant english"

we have all been injured by corona and its mutations, not just us but the whole world. We have all lost people who died because of corona, this last one has mutations one of it is the English variant, which will be our interest in this article. Therefore, in this work we are interested in the study of the local and global asymptotic stability of a new epidemiological model "covid 19 variant English".