Influenza activity is increasing and there is evidence of circulation of influenza within the community and closed settings. This prompted the issue of a CMO letter in week 49 advising that GPs may prescribe antivirals.
Please note that due to the reduced number of working days in week 52, data in this report must be interpreted with caution.
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 52:
The rate of influenza-like illness (ILI) was at Baseline activity level (15 per 100,000).
The proportion of NHS24 respiratory calls was at Moderate activity level (23.7%).
The swab positivity of influenza in primary care was at High activity level (69.6%, 16/23).
The swab positivity of influenza in secondary care was at Moderate activity level (36.9%, 386/1046).
The incidence rate of influenza in secondary care was at Moderate activity level (8.7 per 100,000 population).
The number of new acute respiratory illness outbreaks with onset in week 52 was at Baseline activity level (n=1).
The number of new SARI cases admitted to ICU during week 52 was at Low activity level (n=7).
There were 3 new SARI deaths reported. The SARI case-fatality rate (CFR) reported since week 40 2019 was 15.6% (5/32) and remains within expected seasonal levels (range 22.9% - 35.6%).
The all-cause mortality excess was at Baseline activity level in week 50.
The respiratory syncytial virus (RSV) season started in week 41, peaked in week 48 (Extraordinary activity level) and is currently on a decreasing trend. The large majority of RSV detections thus far have been in those aged under 5 years. The typical RSV season lasts approximately 12 weeks and usually peaks between week 49 and week 52.