The purpose of this study is to assess the safety and tolerability of PRX019 in healthy adult participants.

Inclusion Criteria:

• Male and female participants who are healthy as determined by the investigator based on review of medical history, physical examination, and clinical laboratory tests obtained during the screening period
• Participant is willing and able to adhere to the study visit schedule and other protocol requirements

Exclusion Criteria:

• Evidence of organ dysfunction or any clinically significant deviation from normal in physical examination, vital signs, or clinical laboratory tests beyond what is consistent with a healthy population in the region in which the study is conducted
• Participant was exposed to an investigational drug (new chemical entity) within 90 days preceding the first dose administration, or within 7 times the elimination half-life, if known (whichever is longer)

NOTE: Other protocol-defined inclusion/exclusion criteria apply