Mortality: Since S09, mortality has been declining across all age groups, including among the elderly. The number of deaths recorded in week 11 has fallen below the alert thresholds. Over the first 11 weeks of 2015, winter mortality in the region was 19% higher than expected (17% nationally). Influenza is known to contribute significantly to excess mortality among the elderly, though it is not possible to specify its exact share in the excess observed this season.

Emergency department visits by vulnerable populations: According to available data, emergency department activity for those aged 75 and older and for children under 1 year of age is close to expected levels for this time of year.

Reportable Diseases (MDO)No unusual situation this week.

Acute gastroenteritis (AGE)Moderate activity in Aquitaine. Nationally, there has been an increase in emergency department visits and SOS Médecins consultations for AGE among children.

Influenza and influenza-like illnessesIn Aquitaine, activity continues to decline, trending below alert thresholds, with 3.9% of cases related to influenza for SOS Médecins (compared to 5.3% in Week 11) and 0.2% for Oscour® (compared to 0.3% in Week 11).

Bronchiolitis: Activity remains stable in emergency departments, with 5% of visits involving children under 2 years of age, and within the AquiRespi network, with 59 cases treated during the last shift; however, a slight increase in SOS Médecins activity was observed this week, with 4.6% of cases involving children under 2 years of age compared to 2% the previous week.

Respiratory virology and enterovirus meningitis: A sharp decrease in the circulation of influenza viruses according to the Bordeaux University Hospital, particularly influenza A (20%), influenza B (35%), and rhinoviruses (20%).

Carbon monoxide poisoning (update as of 03/26/15)Since September 2014, there have been 50 cases of CO poisoning (including 2 new cases since 03/11) affecting 156 people in Aquitaine (2 deaths); nationally, 35 deaths have been recorded since September 2014.