In silico comparative study of SARS-CoV-2 proteins and antigenic proteins in BCG, OPV, MMR and other vaccines: evidence of a possible putative protective effect oleh Sondes Haddad-Boubaker, Houcemeddine Othman, Rabeb Touati, Kaouther Ayouni, Marwa Lakhal, Imen Ben Mustapha, Kais Ghedira, Maher Kharrat, Henda Triki