Epidemiological indicators show that the 2014–2015 flu season peaked during weeks 6 and 7 of 2015 in Brittany. The observed decline continued into week 13. The all-age mortality rate recorded by civil registry offices in week 12 exceeded the alert threshold, unlike the 75-and-older age group (where it remained below this threshold). In week 13, the number of deaths from all causes across all age groups and among those aged 75 and older is below the alert thresholds (these estimates should be interpreted with caution, as the data are not yet consolidated due to the usual delays in reporting).