1. This issue of the ECDC Communicable Disease Threats Report (CDTR) covers the period 17-23 January 2021 and includes updates on Legionnaires' disease, COVID-19, dengue, influenza, avian influenza A(H5N6), avian influenza A(H9N2), poliomyelitis and chikungunya.
  2. This risk assessment presents the latest available information on the recent emergence of three variants of concern, VOC 202012/01 identified in the United Kingdom (UK), 501Y.V2 identified in South Africa, and P.1 identified in Brazil and Japan.
  3. For 2019, no cases of plague were reported by any of the EU/EEA countries.
  4. This is the third report for the 2020–2021 influenza season. As of week 53/2020, only 415 influenza detections across the WHO European Region had been reported; 50% type A viruses, with A(H3N2) prevailing over A(H1N1)pdm09, and 50% type B viruses with only four having been ascribed to a lineage, three B/Victoria and one B/Yamagata. This represents a 98% drop in detections compared to the same period in 2019, probably due to the COVID-19 pandemic and measures introduced to combat it.
  5. This report assesses the current status of the EU/EEA and the UK COVID-19 laboratory response based on a short survey sent to all Member States and the UK.