Pilot Study - Monitoring the Nasal Microbiome and Viral Respiratory Infections in Newborn Hospitalized in Neonatalogy.

"* Nasal swab once a week for the duration of the stay in intensive care unit/intensive care (procedure already carried out routinely to detect nasal staphylococcus once a week).~* Nasal swab every 14 days when the newborn is hospitalized in routine care/kangaroo unit/hospitalization at home"