The INFANT study will test whether, in preschool children 12-59 months of age with persistent
asthma, the following Step 2 asthma therapies will provide similar degrees of asthma control:
1. Daily inhaled corticosteroid (ICS) treatment,
2. Daily leukotriene receptor antagonist (LTRA) treatment, and
3. As-needed ICS plus short-acting beta agonist (as-needed ICS/SABA) rescue treatment.