Table 2.

Key findings

Outbreak no.	Statistical alarms during outbreak period	Changes in trends in syndromic surveillance systems during outbreak period
1/2	Statistical alarms in the North East in GPOOH for ‘vomiting’, ‘diarrhoea’ at regional level. Weekly alarm in GPIH for ‘vomiting’, ‘gastroenteritis’ and ‘diarrhoea’	High levels of mid-week GPIH consultations for GI-related conditions midweek (6 March) nationally, in the North East region and Newcastle local authority area compared to comparator periods. High level of mid-week GPOOH compared to preceding and following months.
3	Three national alarms; for ‘vomiting’ in GPOOH and EDSSS and diarrhoea in GPIH surveillance system. Alarms in affected regions; three ‘diarrhoea’ in GPIH and one in GPOOH for ‘gastroenteritis’. Weekly alarms in affected local health authority in GPIH for ‘vomiting’ and ‘diarrhoea’	Appear consistent with comparator time periods
4	Weekly alarms for GPIH surveillance system at local health authority level for ‘gastroenteritis’ and ‘vomiting’	Appear consistent with comparator time periods
5	No relevant alarms	Appear consistent with comparator time periods
6	No relevant alarms	Non-statistically significant mid-week rise in contacts to GPOOH in affected local authority region
7	No relevant alarms	Appear consistent with comparator time periods
8	No relevant alarms	Appear consistent with comparator time periods

GPOOH, General Practitioner ‘out-of-hours’ consultations; GPIH, General Practitioner ‘in-hours’ consultations; GI, gastrointestinal illness; EDSSS, Emergency Department Syndromic Surveillance System.