Genomic evolution of SARS-CoV-2 delta variants pre- and post-omicron emergence using alignment-free machine learning models. - Sankar, Sathish; Anandharaman, Kaushika; Selvam, Pradeesh; Jayaraman, Aswini; Jayakumar, Deepak; Balakrishnan, Pachamuthu; Larsson, Marie; Velu, Vijayakumar; Raju, Sivadoss; Shankar, Esaki M. (PLoS ONE, 2026)