Human immunodeficiency virus (HIV) is a virus that attacks the immune system. Without treatment, HIV causes acquired immunodeficiency syndrome (AIDS). HIV is transmitted sexually, by blood-to-blood contact including through injecting drug use, and vertically, from mother to child.
There were 753 HIV diagnoses in 2025; a 25% decline over the past decade.
While the ten-year trend shows a decline, there was a small increase in diagnoses over the past three years, likely related to unusually low diagnoses during the COVID pandemic, during which there was a marked decline in both risk behaviour and testing.
You can explore the latest HIV data from Australia in the interactive data dashboards below.
These dashboards are best viewed on desktop.