Winter health watch summary: 9 November 2017

Updated 29 March 2018

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1. Summary

1.1 Cold Weather Alert

All regions are currently at Level 1 (Winter preparedness and action). Temperatures or weather conditions are not expected to reach cold weather alert threshold criteria until further notice.

1.2 Flu

During week 44 (ending 5 November 2017), influenza activity was low across all surveillance systems and respiratory syncytial virus (RSV) activity continues to increase.

1.3 Syndromic surveillance

During week 44, there were further small increases in bronchitis or bronchiolitis consultations (GP out of hours) and difficulty breathing calls (NHS 111) in infants aged under 1 year, in line with recent increases in laboratory reports for RSV.

1.4 Norovirus

Reports of suspected and confirmed outbreaks of norovirus in hospitals in England are currently at lower levels than in previous years (2009 to 2016).

Since week 27 in 2017, there have been 900 laboratory reports of norovirus in England and Wales. This is 12% lower than the average number for the same period in the previous 5 seasons from season 2012 to 2013 to season 2016 to 2017 (1028).

1.5 Rotavirus

Since week 27 in 2017, there have been 407 laboratory reports of rotavirus in England and Wales. This is 46% lower than the average for 2013 to 2014 to 2016 to 2017 (749) (the period after vaccine was introduced).

Following the introduction of the rotavirus vaccine into the routine childhood immunisation schedule in July 2013, the total number of laboratory-confirmed rotavirus infections each season has remained low compared to the pre-vaccine period.

1.6 All-cause mortality

In week 44 in 2017, no statistically significant excess all-cause mortality by week of death was seen through the EuroMOMO algorithm in England overall or by age group.