Why asthma often comes back—even with powerful drugs

Biological drugs have been a game-changer for people with severe asthma, helping them breathe easier and live more comfortably. But researchers at Karolinska Institutet have uncovered a surprising twist: while these treatments ease symptoms, they may not fully eliminate the immune cells that drive inflammation. In fact, some of these cells actually increase during treatment, suggesting the medication is managing symptoms without targeting the root cause. This could explain why asthma often returns when the drugs are stopped, raising questions about how long-term these treatments should be and whether we're truly solving the underlying problem.