Summary of the Flu Outbreak in Brittany. 2018–2019 Season.

Key points

• Short epidemic (8 weeks)

• Co-circulation of the A(H1N1)pdm09 and A(H3N2) viruses

• Significant epidemic peak in week 06 (February 4–10)

• Moderate-intensity outbreak in outpatient care

• High number of emergency room visits and hospitalizations

• High number of severe cases admitted to intensive care

• 87 clusters of acute respiratory infections in long-term care facilities

• Excess of 490 deaths from all causes

• Vaccination coverage of 50.4% in at-risk groups, against a target of 75%