Please select the eligibility criteria that correspond to the clinical trial below.
Title: Randomized, Double-Blind, Placebo-Controlled, Parallel Design, Multiple-Dose Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of AMG 157 in Subjects With Mild Atopic Asthma
Brief Summary: The purpose of this study is to assess the late and early asthmatic response after an allergen inhalation challenge in adults with mild atopic asthma after receiving multiple doses of tezepelumab (AMG 157), as well as the safety, tolerability, immunogenicity, and pharmacokinetics of multiple doses of tezepelumab in adults with mild atopic asthma.


Options:
A: Inclusion Criteria:

* Male or female subjects with history of mild atopic asthma between 18 and 60 years-of-age
* Body mass index (BMI) between 18 and 35 kg/m\^2
* Normal or clinically acceptable physical examination (PE), clinical laboratory values, and electrocardiogram (ECG); clinically acceptable PE includes history of mild atopic asthma
* Used only inhaled short-acting β2-agonists infrequently to treat asthma
* No current exposure to allergens to which subject experiences asthmatic responses
* No other lung disease, exacerbations of asthma or lower respiratory tract infections for at least 6 weeks prior to screening
* Positive skin prick test to common aeroallergens at screening
* Additional inclusion criteria apply

Exclusion Criteria:

* History or evidence of a clinically significant disorder (including psychiatric), condition or disease that would pose a risk to subject safety or interfere with the study evaluation, procedures or completion;
* History or current medical conditions that are contraindicated for methacholine challenge, such as myocardial infarction or stroke within previous 3 months, known cardiac disease, uncontrolled hypertension and aortic or cerebral aneurysm
* Evidence of active or suspected bacterial, viral, fungal or parasitic infections within past 6 weeks
* Subject has know type I/II diabetes
* History of residential exposure to tuberculosis or has a positive purified protein derivative (PPD) or QuantiFERON test within 4 weeks before randomization
* Subject who has history of malignancy of any type within 5 years prior to enrollment
* Subjects tested positive for drugs/alcohol or nicotine use at screening
* Subjects tested positive for human immunodeficiency virus (HIV), hepatitis B or hepatitis C
* Additional exclusion criteria apply
B: Inclusion criteria

1. Informed consent (and/or assent as applicable locally) for study participation must be obtained prior to any study related procedures being performed (local regulations are to be followed in determining the assent/consent requirements for children and parent(s)/guardian(s)) and according to international guidelines and/or applicable European Union guidelines.
2. Female and male patients who completed the double-blind treatment period in a predecessor study on benralizumab or matching placebo.
3. Women of childbearing potential (WOCBP) must agree to use an effective form of birth control throughout the study duration and for 16 weeks after last dose of Investigational Product (IP).
4. For WOCBP only: Have a negative urine pregnancy test prior to administration of Investigational Product (IP) at Visit 1.
5. All male patients who are sexually active must agree to use a double barrier method of contraception (condom with spermicide) from the first dose of IP until 16 weeks after their last dose.

Exclusion criteria

1. Any disorder including but not limited to cardiovascular, gastrointestinal, hepatic, renal, neurological, musculoskeletal, infectious, endocrine, metabolic, haematological, psychiatric or major physical impairment that is not stable in the opinion of the Investigator and could:

   * Affect the safety of the patient throughout the study
   * Influence the findings of the studies or their interpretations
   * Impede the patient's ability to complete the entire duration of study
2. A helminth parasitic infection diagnosed during a predecessor study that has either not been treated, has been incompletely treated or has failed to respond to standard of care therapy
3. Any clinically significant change in physical examination, vital signs, electrocardiogram (ECG), haematology, clinical chemistry, or urinalysis during a predecessor study which in the opinion of the investigator may put the patient at risk because of his/her participation in the study, or may influence the results of the study, or interfere with the patient's ability to complete the entire duration of the study
4. Current malignancy or malignancy that developed during a predecessor study (subjects that had basal cell carcinoma, localized squamous cell carcinoma of the skin which was resected for cure, or in situ carcinoma of the cervix that has been treated/cured will not be excluded).
5. Receipt of live attenuated vaccines within 30 days prior to initiation of treatment in this study, during the treatment period, and for 16 weeks (5 half-lives) after the last dose of the investigational product
6. Receipt of immunoglobulin or blood products within 30 days prior to Visit 1
7. Planned major surgical procedures during the conduct of the study
8. Previous participation in the present study
9. Concurrent enrolment in another clinical trial
10. AstraZeneca staff involved in the planning and/or conduct of the study
11. Employees of the study centre or any other individuals involved with the conduct of the study or immediate family members of such individuals
12. Patients with major protocol deviations in any of the predecessor studies at the discretion of the Sponsor
C: Inclusion Criteria:

* Weight between 50 and 125 kg
* Mild, stable allergic asthma
* History of episodic wheeze and shortness of breath
* FEV1 at baseline ≥ 70% of the predicted value
* For women of childbearing potential, agreement to use an effective means of contraception while enrolled in the study
* For men with partners of childbearing potential, willingness to use condoms with spermicide during treatment
* Ability to comprehend and follow all required study procedures
* Positive skin prick test to common aeroallergens (e.g., cat, dust, mite, grass, and pollen)
* Positive allergen-induced early and late airway bronchoconstriction

Exclusion Criteria:

* A worsening of asthma or a respiratory tract infection within 6 weeks preceding study entry
* Acute infection (including viral infection) within the 6 weeks preceding dosing (8 weeks for respiratory infections) or any ongoing chronic infection
* History of recurrent bacterial infection as an adult or history or presence of any chronic infectious condition, including (but not limited to), tuberculosis, parasitic infection, etc.
* Lung disease other than mild allergic asthma
* History of heart, lung, kidney, liver, neurologic or chronic infectious disease
* Concomitant disease or condition, which could interfere with the conduct of the study, including, but not limited to, cancer, alcoholism, drug dependency or abuse, or psychiatric disease
* History of serious adverse reaction or hypersensitivity to any drug
* Pregnancy or lactation or positive serum pregnancy test at screening
* Chronic use of any other medication for treatment of allergic lung disease other than short-acting β2-agonists or ipratropium bromide
* Current (or history of) treatment with a monoclonal antibody or chimeric biomolecule within the past 5 months (5 half-lives of the drug), including omalizumab
* Regular use of tobacco products of any kind or within the previous 6 months, or smoking history \> 10 pack-years
D: Inclusion Criteria:

1. Peripheral blood eosinophil count of ≥150 cells/μL assessed by central lab at Visit 1 or ≥ 300 cells/μL in the past 12 months
2. History of physician diagnosed asthma requiring continuous treatment with high dose ICS (high-dose ICS is budesonide/formoterol HFA ≥640/18 per day or equivalent, fluticasone propionate DPI \> 500/day or equivalent, or authorized generics for these products) plus LABA for at least 6 months prior to Visit 1. The ICS and LABA can be contained within a combination product or given by separate inhalers. The ICS can also be given via nebulized solution for inhalation.
3. Chronic oral corticosteroid therapy equivalent to a daily dose of at least 5 mg of prednisone, for at least 3 continuous months directly preceding Visit 1.
4. Patient should be on a stable OCS dose for at least 4 weeks prior to Visit 1.
5. Non-smokers, current smokers or former smokers with a smoking history of \< or =20 pack-years at Visit 1

Exclusion Criteria:

1. Clinically important pulmonary disease other than asthma or ever been diagnosed with pulmonary or systemic disease, other than asthma, that are associated with elevated peripheral eosinophil counts
2. Known history of allergy or reaction to the study drug formulation
3. History of anaphylaxis to any biologic therapy
4. A helminth parasitic infection diagnosed within 24 weeks prior to the date informed consent is obtained that has not been treated with, or has failed to respond to, standard of care therapy
5. Asthma exacerbation requiring use of systemic corticosteroids, or an increase in maintenance dose of OCS, or acute upper/lower respiratory infections requiring antibiotics or antiviral medication within 30 days prior to Visit 2 (first benralizumab dose)
6. A history of known immunodeficiency disorder including history of a positive human immunodeficiency virus (HIV) test
7. Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) level ≥3 times the upper limit of normal (ULN) confirmed at Visit 1.
8. Receipt of immunoglobulin or blood products within 30 days prior to the date informed consent is obtained
9. Coincident primary adrenal failure (Addison's disease) or irreversible secondary hypoadrenalism due to another independent cause (e.g. pituitary tumour or its treatment)
10. Co-existent inflammatory conditions for which chronic OCS doses are part of their maintenance treatment such as Giant Cell Arteritis, Polymyalgia Rheumatica
11. Exclusion from genetic research may be for any of the exclusion criteria specified in the main study or allogeneic bone marrow transplant, Non-leukocyte depleted whole blood transfusion within 120 days of genetic sample collection
12. Current night-shift workers

Answer: A