How Long Does The Flu Last 2024. In temperate climates, seasonal epidemics occur mainly during winter, while in tropical regions, influenza may occur throughout the year, causing outbreaks more irregularly. The deaths occurred during week 52 of 2023 (the week ending december 30, 2023) and between weeks 4 and 9 of 2024 (the weeks ending january 27, 2024, and march 2, 2024).

Two countries in south america and southern africa experienced very high influenza virus detection levels, and three south american countries experienced earlier. Nine deaths were associated with influenza a viruses.