Efficacy and Safety of BI 655066/ABBV-066 (Risankizumab) in Patients With Severe Persistent Asthma

1. Pre-bronchodilator clinic measured forced expiratory volume (FEV1) of =40% and =85% of predicted normal. 2. One year history of asthma diagnosed by a physician, and have FEV1 reversibility of =12% and an absolute change of at least 200 mL after administration of 400 µg salbutamol. 3. Must be on at least medium dose inhaled corticosteroids and at least one other asthma controller medication for at least one year. 4. Must have documented history of two or more severe asthma exacerbations in the last 12 months.

1. Patients with a significant disease other than asthma. 2. Patients who are not able to produce sputum or sputum samples of sufficient quality. 3. Patients who had clinically relevant history of intubation for asthma exacerbation in the past year. 4. Patients diagnosed with any concurrent respiratory disease. 5. Recent history (within 6 months) of myocardial infarction or hospitalized for cardiac failure in the past year. 6. Patients who have undergone thoracotomy with pulmonary resection. 7. Patients who have undergone bronchial thermoplasty or radiotherapy procedure in the past year or have planned procedures during the study. 8. Patients taking oral corticosteroids with a total daily dose of more than 20 mg prednisone (or equivalent) in the past 6 weeks. 9. Pregnant or nursing women. 10. Women of childbearing potential that, if sexually active, is unwilling to use a highly effective method of birth control. 11. Clinically relevant acute infections or chronic infections. 12. Have received any live bacterial or live viral vaccination in the last12 weeks. 13. Have received Bacille Calmette-Guerin (BCG) vaccination in the last 12 months. 14. Have received treatment with ustekinumab (Stelara®). 15. Have received treatment with any other biologics in the last 3 months or within 6 times the half-life of the compound.