Highly active antiretroviral therapy (HAART) not only benefits the health of individuals with HIV and a history of injection drug use but also reduces transmission of the virus to others in the community. Using province-wide data from British Columbia from 1996 to 2009, NIDA-funded researchers found a strong association between more extensive treatment with HAART and reductions in new HIV diagnoses per year, as well as decreased viral load in patients.
During the study period, as the province expanded HAART coverage more than five-fold as part of its universal health care program, new HIV diagnoses decreased about 50 percent, says lead investigator Dr. Julio Montaner of the British Columbia Centre for Excellence in HIV/AIDS in Canada. The increase in the number of people receiving HAART during the last 5 years of the study was accompanied by a greater decrease in new HIV cases among those with histories of illicit injection drug use than among those with no such history.