Influenza activity is showing signs of decreasing with almost all indicators suggesting falling activity. There remains evidence of circulation of influenza within the community and closed settings. The syndromic surveillance indicators show increased activity in the past week which is likely to be attributed to COVID-19. A CMO letter was issued in week 49 advising that GPs may prescribe antivirals.
A Scottish addendum to the Public Health England guidance on use of antiviral agents for the treatment and prophylaxis of seasonal influenza has been published on the HPS website.
In week 11:
The rate of influenza-like illness (ILI) was at Low activity level (27.6 per 100,000).
The proportion of NHS24 respiratory calls was at Extraordinary activity level (48%).
The swab positivity of influenza in primary care was at Baseline activity level (5.6%, 2/36).
The swab positivity of influenza in secondary care was at Baseline activity level (6.0%, 171/2,852).
The incidence rate of influenza in secondary care was at Baseline activity level (3.4 per 100,000 population).
The number of new acute respiratory illness outbreaks with onset in week 11 was at Baseline activity level (n=0).
The number of new SARI cases admitted to ICU during week 11 was at Baseline activity level (n=0).
There was one new SARI death reported. The SARI case-fatality rate (CFR) reported since week 40 2019 was 18.7% (14/75) and remains below expected seasonal levels (range 22.9% - 35.6%).
The all-cause mortality excess for “all ages” was at Baseline activity level in week 9.