Dose Range Finding Study to Assess Efficacy and Safety of Tozorakimab in Adults With Uncontrolled Asthma on Medium-to-High Dose Inhaled Corticosteroids

Inclusion Criteria:

1. Provision of signed and dated written informed consent prior to any study-specific procedures.
2. Adults aged 18-75, inclusive when signing the informed consent.
3. Documented physician-diagnosis of asthma for at least 12 months.
4. Treated with medium or high dose ICS in combination with LABA.
5. Demonstration of uncontrolled asthma through ACQ-6 score ≥ 1.5 .
6. Pre-bronchodilator FEV1 ≥ 40% to ≤ 90% of predicted normal.
7. Documented exacerbation history in the last 12 months and biomarker requirements of:

   1. ≥ 2 severe exacerbations OR
   2. 1 severe exacerbation and:

   (i) Eosinophils ≥ 150 cells/µl or (ii) FeNo ≥ 25 ppb
8. Participants need to demonstrate a ≥70% compliance for Asthma Daily Diary.
9. Women of Child Bearing Potential (WOCBP) must have a negative pregnancy test.
10. Contraceptive use by males and females should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.

Exclusion Criteria:

1. Completed treatment for respiratory infection with antibiotics in the 4 weeks prior to Visit 1.
2. Clinically significant pulmonary disease other than asthma .
3. Current smokers, former smokers with \>10 pack-years history.
4. Clinically significant aortic stenosis or pulmonary arterial hypertension.
5. Active tuberculosis, hepatitis, HIV, or current diagnosis of cancer or immune complex disease.
6. Unstable cardiovascular disorders.