A clue to clarify the origin of Omicron. - Martinez-Hernandez F; Muñoz-Garcia CI; Rendon-Franco E; Ocampo Cervantes JA; Hernandez-Castro R; Olivo-Diaz A; Romero-Valdovinos M; Maravilla P; Gonzalez-Arenas NR; Villalobos G (Royal Society open science, 2025)