Syndromic Surveillance Summary
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Week 22, 25 May to 31 May 2026

National Syndromic Surveillance Summary:

During week 22 indicators for ‘heat exposure or sunstroke’ associated with the late-May warm weather peaked early in the week (around 26 May) and then declined as temperatures cooled with consistent patterns across all syndromic systems.  Indicators for insect biting continued to remain elevated and above baseline.  Rises in the ‘cellulitis’ indicator were also observed.  Calls and online assessments for diarrhoea also increased and continue to be above seasonally expected levels.

Link to ReSST on gov.uk

Of note this week:

Chart showing daily NHS 111 triaged calls for insect bites (and 7-day moving average), all ages, England.

NHS 111 triaged calls insect bites CHART

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