Highly Active Antiretroviral Therapy is also known as HAART. After invention of Highly Active Antiretroviral Therapy doctors and scientists were able to witness a 50% drop in the number of AIDS-related deaths in the U.S. and Europe. HAART is the combination of three of more drugs given to the infected person. This can suppress the different types of HIV effectively, if one drug is unable to suppress a certain viral type, one or both of the other agent would be helpful. Even with triple combination of drugs few viruses are undetectable which circulates in the bloodstream and mutate in to a resistance strain.