Research and analysis

Syndromic surveillance summary: 15 May 2025 week 19

Updated 15 May 2025

Reporting week 19: 5 May to 11 May 2025

During week 19, impact of heat syndromic indicators decreased from levels reported in the previous week. However, further increases were noted over the weekend of 10 to 11 May in line with recent warm weather. There were also increases in insect bites and allergic rhinitis. Acute respiratory infection indicators remained at or below seasonally expected trends.

Remote health advice syndromic surveillance system

During week 19, NHS 111 triaged calls and online assessments for ‘heat exposure or sunburn’ and insect bites increased, in line with the current period of warm weather. NHS 111 triaged calls and online assessments for acute respiratory infections decreased following seasonally expected trends. NHS 111 vomiting indicators also decreased.

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GP in-hours syndromic surveillance system

During week 19, the GP in-hours consultation rate for allergic rhinitis decreased but remained above baseline levels. Rates for ‘heat or sunstroke’ and insect bites decreased from the previous reporting week but remained just above levels expected for the time of year, in line with the recent spell of warm weather. Impetigo rates increased above expected levels, particularly in children aged 5 to 14 years.

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GP out-of-hours syndromic surveillance system

During week 19, GP out-of-hours contacts for ‘heat or sunstroke’ and insect bites increased during the weekend of 10 to 11 May, although overall both remained at and below seasonally expected levels respectively. Contacts for diarrhoea increased slightly, particularly in the 5 and over age groups. Overall, diarrhoea and vomiting contacts remained above seasonally expected levels.

Access the GP out-of-hours syndromic surveillance bulletins

Emergency department (ED) syndromic surveillance system

During week 19, ED attendances for ‘heat or sunstroke’ remained stable during the week but increased during the weekend of 10 to 11 May in line with the recent warm weather. ED attendances for acute respiratory infections decreased in line with seasonally expected trends. Gastroenteritis attendances remained stable.

Access the emergency department syndromic surveillance bulletins

Ambulance syndromic surveillance system

During week 19, ‘impact of heat or cold’ ambulance calls decreased overall but increased during the weekend of 10 to 11 May in line with recent warm weather. Calls for difficulty breathing continued to decrease and are currently below seasonally expected levels.

Access the ambulance syndromic surveillance bulletins