On Monday 1 December 2025, the occasion of World AIDS Day, Luxembourg’s Ministry of Health and Social Security has launched a campaign on the theme “Undetectable = Untransmissible”.
The ministry remarked that a person living with the virus who follows an effective treatment can maintain the amount of virus in their body at a level that becomes undetectable. In this situation, they no longer transmit the infection, including during pregnancy, childbirth, breastfeeding or unprotected sexual activity. This message helps to reduce prejudice and stigma surrounding people living with HIV.
The ministry reported that in 2024, 39 new infections were diagnosed in Luxembourg, compared with 55 in 2023. They noted that new infections are declining among men who have sex with men and also appear to be decreasing among people who use drugs. However, the number of infections in the heterosexual population remains stable and today represents the most affected group. Diagnoses are also, on average, made earlier than before, improving both life expectancy and quality of life.
The international targets for fighting AIDS set by the World Health Organization (WHO), often referred to as “3 x 95%”, aim for:
• 95% of people living with the virus to be diagnosed;
• 95% of diagnosed people to receive treatment;
• 95% of people on treatment to achieve an undetectable viral load.
According to the ministry, in Luxembourg almost all people living with the virus (estimated at 96%) are diagnosed. However, 12–13% of them are either untreated or not effectively treated. These findings show that medical and psychological support needs to be strengthened to help those who experience difficulties in starting or regularly following their treatment.
