European Immunization Week (EIW) is marked across Europe every year in the final week of April. It aims to raise awareness of the importance of immunisation for the general health and well-being of the European and wider population.
In connection with the European Immunization Week, ECDC releases data indicating an increase in cases of vaccine-preventable diseases such as measles and pertussis, after decreased levels during the COVID-19 pandemic.
During the 2023 West Nile virus transmission season, and as of 4 January 2024, 709 locally acquired human cases of West Nile virus infection, including 67 deaths, were reported by nine European Union countries.
Since the most recent ECDC rapid risk assessment in 2021, the number of EU/EEA countries reporting hypervirulent Klebsiella pneumoniae (hvKp) sequence type (ST) 23 has increased from four to ten and the number of cases reported to ECDC by the countries, increased from 12 to 143.
Campylobacteriosis and salmonellosis were the most frequently reported zoonotic diseases in humans in the EU in 2022. For West Nile virus, an increase of the number of infections was observed.
A joint study of the National Public Health Organization in Greece (NPHO) and the European Centre for Disease Prevention and Control (ECDC) conducted in 15 Greek hospitals in 2022 sheds light on the rapid spread of carbapenemase-producing, highly drug-resistant Klebsiella pneumoniae sequence type (ST) 39, following its initial documentation in a European-wide genomic survey in 2019.
Since January 2022, and as of 11 August 2023, 281 confirmed diphtheria cases, as per the EU case definition (2022: 224 cases, 2023: 57 cases), and four deaths were reported in the EU/EEA.
Since April 2023, over 300 shigellosis cases, many with multidrug-resistant Shigella sonnei -infections, have been reported to the European Centre for Disease Prevention and Control (ECDC).
As of 30 June 2023, European Union, European Economic Area and EU-neighbouring countries have reported 1 340 locally acquired human cases of West Nile virus infection, including 104 deaths, in 2022.