The ECDC Communicable Disease Threats Report (CDTR) is a weekly bulletin for epidemiologists and health professionals on active public health threats. This issue of the ECDC Communicable Disease Threats Report (CDTR) covers the period 7-13 May 2023 and includes updates on measles, COVID-19, influenza and swine influenza, group A Streptococcal infection, Marburg virus disease, Lassa fever, diphtheria and mpox.