If a child 4 years of age or younger has respiratory symptoms consistent with asthma, are you diagnosing asthma or using different terminology such as bronchiolitis or reactive airway disease?

There is no younger age limit at which asthma cannot be diagnosed. As you mentioned, not only do we have guidelines for the classification and management of asthma in children under 4 years of age, the GINA 2025 Report outlines criteria for asthma diagnosis in this age group.

Although diagnosing ast...