Viral fusion proteins x CD4

This is an open-label phase 1b clinical trial enrolling people living with HIV (PLWH) who are antiretroviral therapy (ART)-naïve or have not been on ART for > 24 weeks. This study will enroll PLWH to assess the safety, tolerability, and antiviral effect of bispecific and long-acting bNAbs, alone and in combination. The study will be conducted as a single center study at National Institute for Medical Research-Mbeya Medical Research Center (NIMR-MMRC) in Mbeya, Tanzania.
20 PLWH will be sequentially enrolled into one of 5 arms, each arm comprised of 4 participants. Sequential enrollment will occur in the following order:
* Arm 1 will receive standard daily oral ART.
* Arm 2 will receive a single dose of 10E8.4/iMab 600mg intravenous injection (IV).
* Arm 3 will receive a single dose of 10E8.4/iMab 600mg intramuscular injection (IM).
* Arm 4 will receive a single dose of 10E8.4/iMab 1800mg IV.
* Arm 5 will receive a single dose of combination therapy with both 10E8.4/iMab 1800mg IV and VRC07-523LS 1200mg IV.

Among heavily treatment experienced people living with HIV, the virologic effectiveness of ibalizumab + optimized background regimen from two clinical trials will be compared to non-ibalizumab-containing regimens in routine clinical care in the OPERA cohort.