Updated Australian guidance for health care providers about “undetectable = untransmittable” for HIV

James H McMahon, Brent Allan, Daniel Grace and Nic Holas
Med J Aust 2021; 215 (5): . || doi: 10.5694/mja2.51211
Published online: 6 September 2021

Whether the U = U message is received with scepticism or not, it is clear it is radically challenging the stigma associated with HIV

“Undetectable = untransmittable” (U = U) is a public health campaign that summarises the scientific advances confirming that an undetectable human immunodeficiency virus (HIV) viral load means there is no risk of the sexual transmission of HIV. U = U was launched in 2016, with an international consensus statement from researchers, people with HIV and community partners, to summarise the science around HIV treatment to prevent transmission and improve the lives of people with HIV.1

  • James H McMahon1
  • Brent Allan2
  • Daniel Grace3
  • Nic Holas4

  • 1 Alfred Health, Melbourne, VIC
  • 2 Australasian Society for HIV, Viral Hepatitis and Sexual Health Medicine (ASHM), Sydney, NSW
  • 3 University of Toronto, Toronto, Canada
  • 4 The Institute of Many, Melbourne, VIC



We thank Chinyere Okoli for their advice for this work.

Competing interests:

James McMahon’s institution received funding for the conduct of clinical trials by Gilead, ViiV and Merck. Brent Allan is affiliated with the industry liaison forum of the International AIDS Society, which receives funding from Gilead, ViiV, Merck, Abbott and Janssen.


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