Coverage of the 2015 International AIDS Society Conference coverage of the International AIDS Society Conference on HIV Pathogenesis, Treatment and Prevention (IAS 2015), July 19-22, in Vancouver, Canada.

Conference highlights include HIV treatment as prevention, pre-exposure prophylaxis (PrEP), new antiretroviral therapies, HIV cure research, hepatitis C and HIV/HCV coinfection, and global scale-up of prevention and treatment.

Full listing by topic

IAS 2015 website



Injection Drug Use and Hepatitis C Coinfection Increase Risk of Death for People with HIV

HIV-positive people who inject drugs and those who are coinfected with hepatitis C virus (HCV) have elevated mortality rates, according to a report from the ART Cohort Collaboration published in the July 1 Journal of Acquired Immune Deficiency Syndromes. HIV/HCV coinfected drug injectors had a high risk of liver-related death, but those without HCV still had higher mortality due to various causes compared with non-injectors.


Gilead Requests FDA Approval of Tenofovir Alafenamide Single-Tablet Regimen

Gilead Sciences has requested U.S. Food and Drug Administration approval of a 1-pill-once-daily coformulation containing tenofovir alafenamide (TAF) -- a new formulation that is easier on the kidneys and bones -- plus emtricitabine and Jansen's NNRTI rilpivirine (Edurant), the company announced this week.


HIV-specific Immune Responses Linked to Reduced Infection Risk in PrEP Study

People who remained HIV-negative in the iPrEx pre-exposure prophylaxis (PrEP) trial were more likely to show evidence of HIV-specific T-cell responses, and certain responses were significantly associated with reduced risk of infection, according to research published in the June 22 advance edition of Proceedings of the National Academy of Sciences. These findings suggest that natural immunity may be giving Truvada PrEP a boost in preventing HIV infection.


PD-1 Not Needed for T-Cell Exhaustion and its Absence May Cause Immune Dysfunction

The PD-1 protein is not necessary for exhaustion of CD8 T-cells and the absence of PD-1 regulation may lead to accumulation of more dysfunctional types of T-cells and impaired immune response, according to a mouse study described in the June 29 Journal of Experimental Medicine. These findings shed more light on PD-1 regulation and its role in diseases ranging from HIV infection to cancer.


Vaccine Combo Demonstrates Protection Against HIV-like Virus in Monkey Study

Administering a 2-part prime-boost vaccine prevented infection in half of a dozen rhesus monkeys repeatedly exposed to simian immunodeficiency virus (SIV), and antibody responses against viral envelope proteins appeared to be the key to protection, according to a study published in the July 2 advance edition of Science magazine.


June 27 Is National HIV Testing Day

June 27 is National HIV Testing Day (NHTD), an opportunity to promote HIV screening and awareness of its importance as an entry point to the continuum of care. The Centers for Disease Control and Prevention (CDC) estimates that 14% of people living with HIV do not know they are infected, but new CDC data released this week show that HIV diagnosis rates vary substantially across the country, ranging from 77% in Louisiana to 90% or higher in 5 states.