A nurse in blue scrubs places a band-aid on a young boy's arm after giving him a shot.

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...

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For many people, pets provide unconditional love, companionship and a sense of security. But not all human-pet relationships are beneficial, and some may contribute to stress and anxiety[1] rather than relief.

Psychologists have been studying attachment theory[2] for decades. This framework explains how people form emotional bonds, seek closeness and manage separation. People with secure attachment tend to feel safe in relationships,...

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