A Phase 1, Randomized, Blinded, Placebo-Controlled, Single- and Multiple-Ascending Dose, Safety, Tolerability, Pharmacokinetic, and Pharmacodynamic Study of BIIB091, a Bruton's Tyrosine Kinase (BTK) Inhibitor, in Healthy Adult Participants

This study will evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamics of single and multiple oral doses of BIIB091 in healthy participants.This study will also determine the effect of food on the single oral dose pharmacokinetic (PK).