Communicable disease threats report, 17-23 January 2021, week 3

The ECDC Communicable Disease Threats Report (CDTR) is a weekly bulletin for epidemiologists and health professionals on active public health threats. This issue 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.