This report provides an update on influenza and other seasonal respiratory pathogen activity for the week ending 20 April 2014. For this season, we will provide detailed influenza update reports on a monthly basis with bulletin style weekly updates in the weeks in between.
This report contains summary epidemiological information on influenza-like illness (ILI), its severity and impact in the community and secondary care settings, and vaccine uptake estimates.
The GP consultation rate for influenza-like illness (ILI) and the threshold for normal seasonal activity have been calculated using a new method this season which the European Centre for Disease Prevention and Control (ECDC) is recommending should be used across the EU. Please refer to the technical document for further information.
A guidance document has been issued by HPS with recommendations for the antiviral treatment and prophylaxis of influenza for the season 2013-14.
Due to the reduced number of working days in week 16, data for this week must be interpreted with caution.
Influenza clinical activity remained low overall. Virological activity has fallen this week, and there were no severe cases of influenza reported suggesting community circulation of influenza may be decreasing.
Since week 40 2013, a total of 83 ICU cases have been reported to HPS (77 A(H1N1)pdm09, four A(H3N2) and two A(not subtyped)).
In week 16, the levels of respiratory syncytial virus (RSV) and Mycoplasma pneumoniae (MPN), reported through non-sentinel sources (ECOSS), decreased and were within expected levels. The levels of rhinovirus, coronavirus and adenovirus decreased but remained above seasonal expected levels. The levels of parainfluenza virus and human metapneumovirus (hMPV) increased but were within expected levels.
In week 16, the levels of RSV, parainfluenza, and MPN, reported through sentinel sources, were low and within expected seasonal levels. The levels of adenovirus and hMPV were stable and within expected seasonal levels. The levels of rhinovirus decreased but remained above the expected seasonal levels. The levels of coronavirus decreased and remained within expected levels.