This study consists of two cohorts (Cohort 1 [Single-dose Cohort], and Cohort 2 [Repeat-dose Cohort]). Up to approximately 24 participants will be enrolled in this study, in which up to 12 participants may be enrolled into Cohort 1. However, Cohort 1 will be closed upon implementation of Amendment 2. Approximately 12 participants will be enrolled in Cohort 2. Participants will be randomized in 3:1 ratio (9 lanadelumab: 3 placebo) in each Cohort.
The purpose of this study is to evaluate the safety, pharmacokinetic and pharmacodynamics of lanadelumab administered by intravenous (IV) infusion when added to standard-of-care (SoC) in adults hospitalized with COVID-19 pneumonia.