Syndromic surveillance summary: 29 March 2026 week 13
Updated 2 April 2026
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Reporting week 13: 23 March to 29 March 2026
During week 13, there were decreases observed across acute respiratory infection (ARI) indicators including ED attendances and NHS 111 calls. There were however increases noted in GP in-hours consultation rates for upper and lower respiratory tract infections. Gastroenteritis indicators (including diarrhoea and vomiting) stabilised or decreased during the reporting week. The GP in-hours consultation rate for allergic rhinitis increased in line with expected trends associated with seasonal tree pollen activity.
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.
Remote health advice syndromic surveillance system
During week 13, NHS 111 acute respiratory infection triaged calls and online assessments decreased in the 1 to 4, 5 to 14 and 15 to 44 years age groups, with activity in both indicators remaining below seasonally expected levels. Calls and online assessments for diarrhoea and vomiting also decreased but remained at or above expected levels.
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GP in-hours syndromic surveillance system
During week 13, GP in-hours consultation rates increased across a number of acute respiratory infection indicators including upper and lower respiratory tract infections and acute bronchiolitis. Gastroenteritis indicators (including diarrhoea and vomiting) remained stable but above expected levels. Allergic rhinitis consultations increased in line with expected trends associated with seasonal tree pollen activity.
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GP out-of-hours syndromic surveillance system
During week 13, GP out-of-hours daily contacts for gastroenteritis (including diarrhoea and vomiting) remained stable overall nationally but remained just above expected levels. Daily contacts for acute respiratory infection were stable overall and remained below expected levels but there was a small increase noted in contacts in the 45-64 years age group.
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Emergency department syndromic surveillance system
During week 13, COVID‑19-like and acute respiratory infection attendances decreased, with declines in acute respiratory infection attendances particularly evident in the 5 to 14 and 15 to 44 years age groups. There was also a decrease in gastrointestinal attendances during week 13, particularly in the 15 to 44 years age group.
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Ambulance syndromic surveillance system
During week 13, daily ambulance calls for headache and allergic reactions decreased, with headache calls returning to seasonally expected levels but allergic reactions remaining above expected levels.