Importantly, the ratios of the genetic tags of SfdEnvLow, SfdEnvInter and SfdEnvHigh to SIV Env challenge viruses were not substantially impacted by any of the PGT121 treatments in comparison to the mock group, indicating that simple binding of PGT121 and PGT121LALA-PG without neutralization neither suppressed nor enhanced infection of the first cells (Fig 6B–6D). The gene discussed is ERVW-1; the disease is infection.