A Phase1 Study of VIB9600

"Part 1 (SAD): IV infusion (30, 100, 200, 300 or 1000 mg) or SC injection (300 mg) on Day 1.~Part 2 (MAD): IV infusion (100 and 300 mg) every 2 weeks for 4 weeks (3 doses total; Days 1, 15 and 29)."

Placebo administered by slow IV infusion or SC injection.