Legionellosis in residents of England and Wales: 2017 to 2023
This report presents data from the National Enhanced Legionnaires' Disease Surveillance Scheme (NELSS), covering all confirmed cases of Legionellosis among residents of England and Wales with symptom onset between January 1 and December 31, 2023. It analyses confirmed cases which meet specific clinical and laboratory criteria and compares findings against data from previous years (2017 to 2022). Data is drawn from national surveillance scheme reporting forms and population estimates are based on the 2001 Office for National Statistics census. It provides an epidemiological summary, analyses overall trends and examines how the COVID-19 pandemic impacted the epidemiology of Legionellosis. It focuses on shifts in case numbers and demographic patterns during this period. Data is presented by region, age, sex, and exposure category (community, healthcare-associated, or travel-associated). It includes annual data on the number of clusters investigated. Findings are summarised in tables, figures, and accompanying commentary.