Very little influenza in the WHO European Region during the 2020/21 season, weeks?40 2020 to 8 2021., Adlhoch, Cornelia, Mook Piers, Favelle Lamb, Ferland Lisa, Melidou Angeliki, Amato-Gauci Andrew J., and Pebody Richard , Euro Surveill, 2021 Mar, Volume 26, Issue 11, (2021)