Participants will be enrolled in four cohorts. Within each cohort, participants will be randomly assigned to receive BMS-936559 (Cohort 1: 0.3 mg/kg; Cohort 2: 1 mg/kg; Cohort 3: 3 mg/kg; or Cohort 4: 10 mg/kg) or placebo. The four cohorts will be enrolled sequentially, with researchers reviewing safety data of the cohort before enrolling participants in the next cohort.