Syndromic surveillance summary: 21 June 2026 week 25
Updated 25 June 2026
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Reporting week 25: 15 to 21 June 2026
During week 25, indicators of gastroenteritis were stable or decreasing across several syndromic surveillance systems, though some remained above seasonally expected levels. Syndromic indicators of the impact of heat started to increase across syndromic surveillance systems, in line with the amber heat health alert in place across parts of England.
Remote health advice syndromic surveillance system
During week 25, daily NHS 111 triaged calls and online assessments for both diarrhoea and vomiting were stable but remained above baseline levels. There was an increase in both ‘heat exposure or sunburn’ and ‘insect bites’ in both 111 triaged calls and online assessments, in line with the amber heat health alert in place across parts of England.
Access the remote health advice syndromic surveillance bulletins
GP in-hours syndromic surveillance system
During week 25, GP consultation rates for allergic rhinitis increased but remained slightly below seasonally expected levels. GP consultation rates for insect bites also continued to increase and remained above seasonally expected levels. GP consultation rates for gastroenteritis and diarrhoea decreased, while remaining stable for vomiting.
Access the GP in-hours syndromic surveillance bulletins
GP out-of-hours syndromic surveillance system
During week 25, GP out-of-hours daily contacts for ‘gastroenteritis’, and ‘diarrhoea’ were stable while ‘vomiting’ decreased though all remain above seasonally expected levels. Contacts for ‘insect bites’ increased as expected at the time of year but remain below baseline levels.
Access the GP out-of-hours syndromic surveillance bulletins
Emergency department syndromic surveillance system
During week 25, emergency department (ED) attendances for heat or sunstroke increased on Sunday 21 June, in line with the amber heat health alert in place across parts of England. ED attendances for acute respiratory infections increased slightly but remained at seasonally expected levels.
Access the emergency department syndromic surveillance bulletins
Ambulance syndromic surveillance system
During week 25, there were increases in ‘unconscious or passing out’, ‘injuries’ and ‘allergies’. There was also a small increase in ‘impact of heat or cold’, in line with increasing temperatures.