Long-term Safety of Tezepelumab in Japanese Subjects With Inadequately Controlled Severe Asthma

Inclusion Criteria: Age. 12-80 Documented physician-diagnosed asthma for at least 12 months Subjects who have received a physician-prescribed asthma controller medication with medium or high dose ICS for at least 12 months. Documented treatment with a total daily dose of either medium or high dose ICS (≥ 500 µg fluticasone propionate dry powder formulation equivalent total daily dose) for at least 3 months. At least one additional maintenance asthma controller medication is required according to standard practice of care and must be documented for at least 3 months. Documented history of at least 1 asthma exacerbation events within 12 months. ACQ-6 score ≥1.5 at screening or on day of registration. Exclusion Criteria: Pulmonary disease other than asthma. History of cancer. History of a clinically significant infection. Current smokers or subjects with smoking history ≥10 pack-yrs. History of chronic alcohol or drug abuse within 12 months. Hepatitis B, C or HIV. Pregnant or breastfeeding. History of anaphylaxis following any biologic therapy. Subject randomized in the current study or previous tezepelumab studies