A Study to Assess the Pharmacokinetics and Safety of Single Doses of Anifrolumab in Healthy Subjects

This is a Phase I placebo-controlled study to assess the pharmacokinetics, safety and
tolerability of 2 doses of anifrolumab via the subcutaneous (SC) route of administration and
1 dose of anifrolumab via intravenous (IV) route in healthy subjects

Inclusion Criteria:

1. Provision of signed and dated, written informed consent prior to any study specific
procedures.

2. Healthy male and/or female subjects aged 18 - 55 years.

3. Females must have a negative pregnancy test at screening.

4. Females with an intact cervix must have documentation of a Pap smear with no
documented malignancy.

5. Have a body mass index (BMI) between 18 and 32 kg/m2, inclusive, and weigh at least 50
kg.

6. Must have adequate abdominal adipose tissue for SC injection.

7. No history of latent or active TB prior to screening.

8. A chest radiograph with no evidence of current active infection or old active TB,
malignancy, or clinically significant abnormalities within 6 months prior to
screening.

Exclusion Criteria:

1. History of any clinically significant disease or disorder which may put the subject at
risk .

2. History or presence of hepatic or renal disease.

3. Any clinically significant illness, medical/surgical procedure, or trauma within 8
weeks of participation .

4. Any clinically significant chronic or recent infection requiring hospitalization or
treatment with anti-infectives.

5. History of cancer, apart from squamous or basal cell carcinoma of the skin.

6. Any clinically significant lab, vital sign or ECG abnormalities as judged by the
investigator.

7. Known history of a primary immunodeficiency,HIV splenectomy or an underlying
condition.

8. Any positive result on screening for hepatitis B, hepatitis C or HIV antibody.

9. History of drug abuse within 1 year of participation.

10. Has received another new chemical entity (defined as a compound which has not been
approved for marketing) within 4 weeks or 5 half-lives prior to participation.

11. Previous receipt of:

- Anifrolumab;

- B cell-depleting therapy (including but not limited to epratuzumab, ocrelizumab,
or rituximab) ≤ 52 weeks prior to screening.

12. History of allergy/hypersensitivity to drugs with a similar chemical structure or
class to anifrolumab or to any human gamma globulin therapy.

13. Any live or attenuated vaccine within 8 weeks prior to participation.