In February 2025, flu rates spiked to the highest levels seen in at least 15 years[1], with flu outpacing COVID-19 infections and hospitalizations[2] for the first time since the beginning of the COVID-19 pandemic. The Centers for Disease Control and Prevention has classified this flu season as having “high” severity[3] across the U.S.
The Conversation asked epidemiologist[4] Annette Regan[5] to explain why this flu season...