GPT and Decreased total neutrophil count: There were 9 AEs (3.8% of all AEs, 95% CI: 2%, 7%) occurring in 8 participants that were deemed product related by the investigators; all were mild and transient, and those occurring following VRC01 administration included elevations of hepatic transaminases (aspartate transaminase [AST] and alanine transaminase [ALT] elevation in 1 participant), elevated creatinine, neutropenia, localized injection site pruritus, diarrhea, generalized rash, and varicella zoster virus reactivation.