Researchers have developed a new antibody-based drug that has the potential to slow down the replication of the human immunodeficiency virus (HIV) in the body and may also provide a better strategy for long-term control of the deadly infection. Anti-retroviral therapy -- a combination of drugs that slows the replication of HIV in the body -- currently used to treat HIV has drawbacks. If a person discontinues his or her treatment even missing a few doses the level of the virus in the body is able to rebound quickly. In the antibody therapy the researchers used 3BNC117 -- a molecule