Syndromic surveillance summary: 12 April 2026 week 15
Updated 23 April 2026
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Reporting week 15: 6 April to 12 April 2026
In week 15, syndromic surveillance across healthcare services indicated broadly stable or declining activity overall, with respiratory infections decreasing and remaining at or near seasonal expectations. Gastroenteritis indicators (including diarrhoea and vomiting) were stable or decreasing across services, although GP in-hours consultations remained above expected levels and there was a small increase in GP out-of-hours diarrhoea contacts among adults aged 45 to 64 years. Allergic rhinitis consultations continued to increase, consistent with seasonal pollen activity.
Please note: some of the observed increases in syndromic indicators reported during week 12 may reflect changes in healthcare seeking behaviour linked with public health messaging during the invasive meningococcal disease outbreak in South East England. During week 14, healthcare seeking behaviour patterns may have changed due to different availability during the National Bank Holidays during Easter, so trends should be interpreted with caution.
Remote health advice syndromic surveillance system
During week 15, NHS 111 acute respiratory infection triaged calls and online assessments both decreased nationally and were below seasonally expected levels. Diarrhoea indicators had no overall trend and remained above seasonally expected levels. Triaged calls for vomiting decreased, however remained above seasonally expected levels.
Access the remote health advice syndromic surveillance bulletins
GP in-hours syndromic surveillance system
During week 15, GP in-hours consultation rates for acute respiratory infection indicators continued to decrease or remained stable. Consultation rates for gastroenteritis indicators (including diarrhoea and vomiting) decreased or remained stable but were above expected levels. Allergic rhinitis consultation rates increased and are broadly following baseline activity associated with seasonal tree pollen activity.
Access the GP in-hours syndromic surveillance bulletins
GP out-of-hours syndromic surveillance system
During week 15, GP out-of-hours daily contacts for acute respiratory infections decreased nationally and were similar to seasonally expected levels. Whilst national diarrhoea contacts remained stable, there was a small increase in contacts in the 45 to 64 years age group.
Access the GP out-of-hours syndromic surveillance bulletins
Emergency department syndromic surveillance system
During week 15, acute respiratory infection attendances decreased, with activity similar to seasonally expected levels. Attendances for acute bronchiolitis or bronchitis also decreased and were below expected levels. Attendances for gastroenteritis decreased, with activity remaining below seasonally expected levels. Acute alcohol intoxication attendances continued to increase, particularly in the over 65 years age group, and remained slightly above seasonally expected levels.
Access the emergency department syndromic surveillance bulletins
Ambulance syndromic surveillance system
During week 15, daily ambulance calls for headache continued to decrease. All other syndromic indicators remained stable.