Primary Objective:
To evaluate the long-term efficacy and durability of ibalizumab in combination with other antiretrovirals by comparing the virologic, immunologic and clinical outcomes of patients receiving ibalizumab treatment vs. matched patients not receiving ibalizumab.Secondary Objective:
To assess the efficacy of ibalizumab in combination with other antiretrovirals by comparing the virologic, immunologic and clinical outcomes of patients before and after they receive ibalizumab treatment.
To assess the long-term safety and tolerability of ibalizumab.
Other Objectives:
To assess risk factors/predictors of virologic and immunologic response.