Since the beginning of 2025, over three million dengue cases and over 1 400 dengue-related deaths have been reported from 90 countries/territories in the WHO Regions of the Americas (PAHO), South-East Asia and West Pacific Regions (SEARO and WPRO, respectively), in the Eastern Mediterranean WHO Region (EMRO) and in Africa.
Since the beginning of 2025, and as of beginning of June, approximately 220 000 CHIKVD cases and 80 CHIKVD-related deaths have been reported in 14 countries/territories. Cases have been reported in the Americas, Africa, and Asia, and while no cases have been reported in mainland Europe, in Réunion and Mayotte (outermost regions of the European Union), CHIKVD outbreaks are ongoing.
ECDC regularly assesses new evidence on variants detected through epidemic intelligence, rules-based genomic variant screening or other scientific sources.
This issue of the ECDC Communicable Disease Threats Report (CDTR) covers the period 31 May - 5 June 2025, and includes updates on Influenza A(H5N1), Middle Eastern Respiratory Syndrome (MERS), Chikungunya virus disease, Dengue, Salmonellosis, Crimean-Congo haemorrhagic fever, and mass gathering monitoring for the Hajj.
For 2023, 30 European Union/European Economic Area (EU/EEA) countries reported 10 901 confirmed cases of Shiga toxin-producing Escherichia coli (STEC) infection.
In 2023, 30 countries reported 2 993 confirmed listeriosis cases in the EU/EEA – the highest annual number of cases since the start of the EU/EEA-wide surveillance.
Shiga toxin-producing Escherichia coli (STEC) and Listeria infections in the European Union/European Economic Area (EU/EEA) reached their highest levels in 2023 since the start of EU-wide surveillance in 2007, according to the latest annual epidemiological reports issued today by the European Centre for Disease Prevention and Control (ECDC).
