The problem of HIV latency is a focus of Siliciano's research. When HIV
integrates into the genome of a host cell but remains
transcriptionally silent in a state known as "latency," the immune system is unable to detect and destroy the infected cell and its virus. In 1995, Siliciano's lab provided the first demonstration that latently infected cells are present in persons living with HIV. They developed the methods that are widely used to study this reservoir. Working together with his wife Janet Siliciano, he demonstrated that the latent reservoir decays so slowly that lifetime persistence of HIV is guaranteed even in people taking effective combinations of antiretroviral drugs. Because the latent reservoir is the major barrier to curing HIV infection, it is subject of an intense international research effort.
Antiretroviral drugs are highly effective at controlling virus replication, but they also have several drawbacks. Some people experience
side effects when taking these medications, and if treatment is interrupted, HIV can emerge from this latent reservoir and begin replicating and spreading again. Therefore, HIV treatment must be continued for life. ==Honors and awards==