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Talking About HIV Status: Disclosure, U=U and Serodifferent Couples
Sex & Society 8 min read
Undetectable means untransmittable. That is not a hopeful slogan. It is what three large studies found after following serodifferent couples for years.
In this article
Language stuck in the 1990s Undetectable equals untransmittable How to tell someone How to receive a disclosure How serodifferent couples live PrEP and testing Free care, and being seen Where to start

Most of what adults here believe about HIV was learnt from a poster in the late 1990s. The biggest change since is one almost nobody has been told: a person on effective treatment, with a viral load kept undetectable, does not pass HIV to a sexual partner.

Language stuck in the 1990s

The vocabulary of that era was built around dying, and outlasted the medicine by decades. People who were schoolchildren then still carry the fear, and often the misinformation with it: that HIV travels through a shared plate, a razor, a swimming pool. None of that is true.

Trickey and colleagues pooled cohort data from Europe and North America and found that for adults on long-term antiretroviral therapy, life expectancy at 40 approached that of the general population. They are careful about it: the gap remains substantial for people whose CD4 count remains low. A disclosure gets received as a catastrophe by someone responding to 1996 rather than to now.

Undetectable equals untransmittable

HIV treatment suppresses the virus until routine blood tests can no longer detect it. That is an undetectable viral load. When it is sustained, the person does not transmit HIV sexually. Not low risk. Not reduced risk. Does not transmit.

A person living with HIV who is on treatment and has a sustained, test-confirmed undetectable viral load does not pass the virus on through sex. That is what U=U means, and most people have never been told it.

Three large prospective studies followed serodifferent couples having sex without condoms. Rodger and colleagues published the first PARTNER results in JAMA in 2016 and the final results in The Lancet in 2019; Bavinton and colleagues ran Opposites Attract in The Lancet HIV in 2018. Where the partner living with HIV was virally suppressed, there were no HIV transmissions genetically linked to that partner.

The conditions matter. Undetectable means sustained, not one good reading, confirmed by regular viral load testing rather than assumed, and maintained by taking the medication as prescribed. Treatment decisions belong with a doctor.

How to tell someone

There is no perfect script, and no requirement to hand a medical history to a stranger. What works is early, calm and short: before things get physical, somewhere private, in ordinary words.

Say the fact, then the science, then stop talking. "I am HIV positive. I am on treatment and my viral load is undetectable, which means I cannot pass it on sexually." The second sentence does the work, because most listeners have never heard it and will otherwise fill the silence with what they think they know.

Silence is not always rejection, and a question is not an insult.

On timing: you choose the moment. The useful test is not how soon, but whether it happens before this becomes sexual and while there is still room to talk.

How to receive a disclosure

If someone tells you they are living with HIV, they have rehearsed it and are braced for you to flinch. The most useful thing you can do in the first ten seconds is not flinch.

"Thank you for telling me" is a complete opening. Then ask the ordinary questions: are you on treatment, is your viral load undetectable, how long has it been that way.

Do not ask how they got it. Do not go quiet and then disappear. Do not repeat it to anyone else. Meher, hearing it from someone she had been seeing a month, said the only thing she got right was answering straight away, because the pause is what the other person reads.

How serodifferent couples live

A serodifferent couple is one where one partner has HIV and the other does not. On treatment they are unremarkable: daily medication for one partner, viral load tests at the intervals their doctor sets.

Conception is what couples ask about least and worry about most. Where the partner living with HIV has a sustained, test-confirmed undetectable viral load, conceiving through ordinary sex without condoms does not expose the negative partner to HIV, because that is the act those studies measured. Transmission from parent to baby is preventable with treatment. Start that conversation early, with an obstetrician and an HIV physician together.

Some serodifferent couples still use condoms, for contraception or other infections. Some do not. The choice belongs to the two people and their doctor.

PrEP and testing

PrEP, pre-exposure prophylaxis, is HIV medication taken by someone who does not have HIV to avoid acquiring it. Taken as prescribed it is highly effective. It is a prescription medicine, started and monitored with a doctor, with HIV testing before and during.

Access is where honesty is required. The National AIDS Control Organisation issued national technical guidelines for PrEP in 2022, so the framework exists on paper. But an editorial by Gaur and Rakhmanina in the Indian Journal of Medical Research described uptake as low, estimating slightly over seven thousand people had initiated PrEP since 2017, with access coming mainly through private providers and selected non-governmental organisations.

Testing has a window period, the gap between an exposure and the point a test can detect infection. The CDC puts antibody tests at roughly 23 to 90 days after exposure, laboratory antigen and antibody tests at 18 to 45 days, and nucleic acid tests at 10 to 33 days. A negative result inside it is not final.

Free care, and being seen

The public HIV programme here is genuinely good, and most people have no idea it exists. Counselling and testing are provided free at Integrated Counselling and Testing Centres, the ICTCs attached to government hospitals, where a person is tested at their own request or on a doctor's advice at no cost. Antiretroviral drugs are provided free at government ART centres, with counselling before and during treatment. Free lifelong treatment for a chronic infection is not a small thing.

Set against that is the reason many people never walk in. In a small town the counsellor may be someone your mother knows. The chemist is on your street. The ART centre is a building everyone can identify, and being seen going through its door is its own form of disclosure. Perlo and colleagues, interviewing people living with HIV in India, found that participants avoided treatment freely available at nearby government facilities because of disclosure concerns and perceptions of poor quality, travelling instead to private providers and absorbing costs that later became the reason they stopped attending at all.

Some register at a centre in another town where nobody knows them. Some pay for a private test first, where they can afford one. Some begin with the national AIDS helpline on 1097, a toll free number listed by the National AIDS Control Organisation, which can direct a caller to ICTC and ART locations.

There is also a law. The HIV and AIDS (Prevention and Control) Act came into force in September 2018. It prohibits discrimination against people living with and affected by HIV in settings including employment, education, housing and healthcare, protects the right to informed consent for testing and to confidentiality, and obliges healthcare institutions to establish complaints mechanisms, with an ombudsman at state level.

Where to start

If you are the one disclosing, write your two sentences down and read them until they are boring. If you are the one who might be told, decide now what your first five words will be. The conversation goes better when at least one person in the room knows what undetectable actually means.

The one thing to remember: HIV is a treatable long-term condition, and a person on effective treatment with a sustained, test-confirmed undetectable viral load does not pass it on sexually. Testing at ICTCs and treatment at government ART centres are free. Decisions about treatment, viral load monitoring and PrEP are made with a doctor.

Sources

  1. Rodger AJ, Cambiano V, Bruun T, et al. Sexual activity without condoms and risk of HIV transmission in serodifferent couples when the HIV-positive partner is using suppressive antiretroviral therapy. JAMA. 2016;316(2):171. doi:10.1001/jama.2016.5148
  2. Rodger AJ, Cambiano V, Bruun T, et al. Risk of HIV transmission through condomless sex in serodifferent gay couples with the HIV-positive partner taking suppressive antiretroviral therapy (PARTNER): final results of a multicentre, prospective, observational study. The Lancet. 2019;393(10189):2428-2438. doi:10.1016/S0140-6736(19)30418-0
  3. Bavinton BR, Pinto AN, Phanuphak N, et al. Viral suppression and HIV transmission in serodiscordant male couples: an international, prospective, observational, cohort study. The Lancet HIV. 2018;5(8):e438-e447. doi:10.1016/S2352-3018(18)30132-2
  4. Trickey A, Sabin CA, Burkholder G, et al. Life expectancy after 2015 of adults with HIV on long-term antiretroviral therapy in Europe and North America: a collaborative analysis of cohort studies. The Lancet HIV. 2023;10(5):e295-e307. doi:10.1016/S2352-3018(23)00028-0
  5. Perlo J, Colocci I, Rajagopal SS, et al. The convergence of disclosure concerns and poverty contributes to loss to HIV care in India: a qualitative study. Journal of the International Association of Providers of AIDS Care. 2020;19. doi:10.1177/2325958220934606
  6. Gaur A, Rakhmanina N. What will it take to expand the pre-exposure prophylaxis to prevent new HIV infections in India? Indian Journal of Medical Research. 2025;160:527-529. doi:10.25259/IJMR_2102_2024
  7. National AIDS Control Organisation, Ministry of Health and Family Welfare, Government of India. Hotlines and helplines: National AIDS Helpline 1097. naco.gov.in, Hotlines and helplines. The HIV and AIDS (Prevention & Control) Act, 2017. naco.mohfw.gov.in, HIV and AIDS Act 2017
  8. Centers for Disease Control and Prevention. Getting tested for HIV: test types and window periods. cdc.gov, HIV testing

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