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Undetectable = Untransmittable (U=U) - Minnesota Dept. of Health

Undetectable = Untransmittable (U=U)

NEW: U=U Provider Survey

When taken as prescribed, HIV medications can decrease the amount of HIV present in a person's blood, or "HIV viral load", to be too low to measure. This is called being undetectable. Being undetectable prevents HIV disease from progressing and allows people to live long and healthy lives. It also protects the health of their sex partners.

People cannot pass HIV through sex when they have undetectable levels of HIV. This prevention method is estimated to be 100% effective as long as the person living with HIV takes their medication as prescribed and gets and stays undetectable. This concept known as Undetectable = Untransmittable (U=U).

How it works

  1. Become undetectable. This can take up to 6 months after starting HIV medication. Your health care provider will perform blood tests and let you know when you're undetectable.
  2. Stay undetectable. Get a second undetectable test result at least 6 months after the first. Continue to take your HIV medications daily and visit your health care provider regularly. They will monitor your blood tests to make sure you’re still undetectable.

timeline visual showing how to use HIV treatment as prevention

For more information

Updated Monday, 07-Nov-2022 10:52:35 CST