Nosocomial infections and infectious risks related to hospital environment Nabila Saouide El Ayne, Hinde Hami, Samir Hamama, Sanou Khô Coulibaly, Abdelrhani Mokhtari and Abdelmajid Soulaymani E3S Web Conf., 319 (2021) 02023 Published online: 24 November 2021 DOI: 10.1051/e3sconf/202131902023