Last updated on 10-1-2023 by Melissa Vermeulen Download 871.54 KBPublic AccessPublished Sci. report, recommendat°, guidance doc., directive, monograph Dutch SCIENSANO AuthorsNathalie Bossuyt; Melissa Vermeulen; Valeska Laisnez; Katrien Latour; Cyril Barbezange; Sarah Denayer; François Dufrasne Keywords Article written during project(s) : NRC Influenza National Reference Centre for Influenza: surveillance of influenza-like illness and severe acute respiratory infections in Belgium Associated health topics: