This report contains genetic and antigenic characterization data generated at the Worldwide Influenza Centre for viruses with collection dates after 31 January 2023 until 31 August 2023.
Sixty cases of diphtheria due to toxigenic Corynebacterium diphtheriae (n=29) or C. ulcerans (n=31), and one case with unknown pathogen were reported to ECDC in 2021.
This issue of the ECDC Communicable Disease Threats Report (CDTR) covers the period 10-16 December 2023 and includes updates on measles, chikungunya, dengue, SARS-CoV-2, diphtheria, West Nile virus, respiratory virus epidemiology and influenza.
Several viral and bacterial respiratory pathogens are expected to continue co-circulating at variable levels during the coming months, and contribute to increased morbidity and mortality during this period. This is typical of every winter season.