This is an open-label, parallel-group, phase 1, single center study to assess the relative bioavailability of CSL312 administered subcutaneously via a prefilled syringe assembled to an autoinjector compared to a prefilled syringe assembled to a needle safety device in healthy, adult subjects.

Inclusion Criteria:

• Healthy Male or female 18 to 55 years of age
• Body weight in the range of ≥ 50 kg and ≤ 100 kg, with a body mass index (BMI) of ≥ 18 kg/m2 and ≤ 30 kg/m2

Exclusion Criteria:

• Received any live viral or bacterial vaccinations within 8 weeks of Screening or is expected to receive any live virus or bacterial vaccinations during the study or up to 4 months after last administration of the investigational product.
• Evidence of current active infection, including severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2).
• Blood pressure or pulse rate measurements outside the normal range for the subject's age

CSL will consider on a case-by-case basis requests to share Individual Patient Data (IPD) with external bona-fide, qualified scientific and medical researchers. For information on the process and requirements for submitting a voluntary data sharing request for IPD, please contact CSL at clinicaltrials@cslbehring.com.

Requests for IPD will generally be considered once review by major regulatory authorities (ie FDA, EMA) is complete and the primary publication is available.

Proposed research should seek to answer a previously unanswered important medical or scientific question.

Applicable country specific privacy and other laws and regulations will be considered and may prevent sharing of IPD.

If the request is approved and the researcher has executed an appropriate data sharing agreement, IPD that has been appropriately anonymized will be available.