People with asthma received a device that tracks data related to their inhalers. After a year, the patient group saw a 78% reduction in rescue inhaler use, and a 48% increase in symptom-free days, according to a study.

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People with asthma received a device that tracks data related to their inhalers. After a year, the patient group saw a 78% reduction in rescue inhaler use, and a 48% increase in symptom-free days, according to a study.