Syndromic surveillance summary: 26 April 2026 week 17
Updated 30 April 2026
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Reporting week 17: 20 April to 26 April 2026
During week 17, acute respiratory infection indicators decreased across all systems. Diarrhoea indicators were mostly stable or decreasing, though there were slight increases in vomiting indicators both the GP in hours and GP out-of-hours systems. Allergic rhinitis consultations increased, consistent with seasonally expected levels.
Remote health advice syndromic surveillance system
During week 17, NHS 111 acute respiratory infection triaged calls and online assessments continued to decrease nationally and remained below seasonally expected levels. Triaged calls and assessments for diarrhoea and vomiting also decreased.
Access the remote health advice syndromic surveillance bulletins
GP in-hours syndromic surveillance system
During week 17, GP in-hours consultation rates for acute respiratory infection indicators continued to decrease, or remained stable. Consultation rates for gastroenteritis and diarrhoea remained stable, though there was a slight increase in vomiting consultation rates. Allergic rhinitis consultation rates also increased, with levels remaining similar to what is seasonally expected.
Access the GP in-hours syndromic surveillance bulletins
GP out-of-hours syndromic surveillance system
During week 17, GP out-of-hours daily contacts for fever increased slightly, with activity below seasonally expected levels. Gastroenteritis and vomiting contacts increased slightly and are above expected levels. Contacts for chest pain also increased, mainly in the 65 years and over age group, and are above expected levels.
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Emergency department (ED) syndromic surveillance system
During week 17, ED attendances for respiratory infection indicators continued to decrease nationally, in line with seasonal expectations.
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Ambulance syndromic surveillance system
During week 17, daily numbers of ambulance calls for headache decreased. Calls for difficulty breathing also decreased and were similar to the seasonally expected levels.