In week 39 of 2026 (21-27 September 2026), 1,168 cases of acute respiratory infections and influenza were recorded amongst a monitored population of 347,913 people, representing an incidence rate of 33.57 per 10,000 population. In the previous week, 856 cases were recorded (an incidence rate of 24.60 per 10,000 population). The incidence rate in all age groups has increased compared with the previous week, with the rise being most pronounced in the 0-4 age group (193.21 per 10,000 population) and the 5-14 age group (96.94 per 10,000 population). During week 38, the National Reference Laboratory for Influenza and Acute Respiratory Infections tested 9 samples from children under 5 years of age, in which adenoviral infections (1), PIV (2) and other viruses (1) were detected.