Syndromic surveillance summary: 11 September 2025 week 36
Updated 11 September 2025
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Reporting week 36: 1 September to 7 September 2025
During week 36, most syndromic indicators were following baseline patterns. Small rises were noted in a number of respiratory indicators; acute respiratory infections, acute bronchitis and bronchiolitis. These however followed a seasonally expected pattern.
Remote health advice syndromic surveillance system
During week 36 vomiting calls were stable but there was a slight increase in calls for children aged under one year, consistent with that seen in previous years.
Note that we are currently investigating a potential data quality and coding issue within NHS 111 online assessments across selected indicators in the South East region. Therefore, recent trends in online assessment data for the South East should be interpreted with some caution; this has particularly affected the ‘vomiting’, ‘acute respiratory infections’ and ‘eye problems’ indicators in recent weeks, impacting the national trend, especially in adults aged 45 years and over.
Access the remote health advice syndromic surveillance bulletins
GP in-hours syndromic surveillance system
During week 36 GP consultation rates for acute bronchitis increased slightly nationally but remain similar to baseline levels. Other respiratory indicators remained stable and are similar to or below seasonally expected levels.
Week 36 also saw an increase in impetigo with levels slightly above seasonally expected. There was also an increase in consultations for gastroenteritis, which remain above seasonally expected levels.
Access the GP in-hours syndromic surveillance bulletins
GP out-of-hours syndromic surveillance system
During week 36, there was a very slight increase in GP out-of-hours daily contacts for acute respiratory infections, which remain at baseline levels.
Note that we continue to investigate a potential change in coding practice by one GP out-of-hours service provider during week 32 (from Monday 4 August) which may have impacted on national trends, causing small increases in some syndromic indicators from the beginning of August.
Access the GP out-of-hours syndromic surveillance bulletins
Emergency department syndromic surveillance system
During week 36, ED attendances for acute bronchiolitis increased, particularly in younger children (aged up to 4 years). Although a small number of attendances, attendances for scarlet fever increased above baseline during the past week.
Access the emergency department syndromic surveillance bulletins
Ambulance syndromic surveillance system
During week 36, daily ambulance calls for headache increased slightly yet remained below seasonally expected levels.