HIV has not been broadly cured, but a small number of people have been declared free of the virus after receiving specialized stem cell transplants. As of mid-2024, seven individuals worldwide are considered cured or in long-term remission. For everyone else, modern treatment can suppress the virus to undetectable levels, effectively preventing illness and transmission, but it requires lifelong medication. A universal, scalable cure does not yet exist.
The Seven People Cured So Far
The first person cured of HIV was Timothy Ray Brown, known as the Berlin patient. In 2007, Brown received a stem cell transplant to treat leukemia. His doctors deliberately chose a donor who carried a rare genetic mutation called CCR5-delta 32. That mutation makes cells resistant to HIV because it blocks the doorway the virus uses to enter and infect immune cells. After the transplant, Brown’s HIV never returned. He lived virus-free until his death from recurrent leukemia in 2020.
Since then, six more people have followed a similar path. Adam Castillejo, the London patient, went into remission after a transplant in 2016. A patient in Düsseldorf, another in New York, and Paul Edmonds, treated at City of Hope in California, all achieved remission after receiving stem cells from donors with the same CCR5-delta 32 mutation. Edmonds was 66 at the time of his announcement in 2022 and had lived with HIV for over 30 years, making him the oldest person and longest-term HIV carrier in the group. A seventh case, a 60-year-old German man who had a transplant in 2015, was reported at the international AIDS conference in 2024. One additional case from 2023 is notable because the donor did not carry the CCR5 mutation at all, yet the patient still entered prolonged remission.
Why This Can’t Be Used for Everyone
Every one of these cured patients needed the transplant for a life-threatening blood cancer, not just for HIV. Stem cell transplants are among the most dangerous procedures in medicine. In one study of 49 HIV-positive patients who underwent the procedure, only about 57% were alive after one year. Nearly 60% developed graft-versus-host disease, a serious complication where the donor’s immune cells attack the recipient’s body. Deaths from infection, organ failure, and cancer relapse were common.
No doctor would recommend this procedure for someone whose HIV is already well-controlled by medication. The risks of the transplant far outweigh the burden of taking a daily pill. On top of that, the CCR5-delta 32 mutation is rare, found almost exclusively in people of Northern European descent. Finding a tissue-matched donor who also carries two copies of this mutation is extraordinarily difficult. These cures are proof that eliminating HIV from the body is possible, but they are not a treatment model that can scale to the nearly 40 million people living with the virus worldwide.
What “Cured” Actually Means
Researchers distinguish between two types of cure. A sterilizing cure means every trace of HIV has been eliminated from the body. A functional cure, sometimes called medicine-free remission, means the virus may still be present in tiny amounts but cannot replicate or cause harm, and the person no longer needs medication. Most of the transplant patients are believed to have achieved something close to a sterilizing cure, since their entire immune system was replaced with HIV-resistant cells.
The challenge is that HIV hides. The virus inserts its genetic code directly into the DNA of certain immune cells, where it can sit silently for decades. These hidden copies, called the latent reservoir, are invisible to the immune system and untouched by standard medication. Any true cure has to either destroy every one of these infected cells or permanently prevent the virus from reactivating.
How Treatment Works Today
While a universal cure remains out of reach, modern antiretroviral therapy has transformed HIV from a death sentence into a manageable chronic condition. People who start treatment early and take it consistently can expect a life span approaching that of the general population. The gap in life expectancy between HIV-positive people on treatment and the general population has been narrowing steadily over the past decade.
Perhaps the most significant finding in recent years is that effective treatment also prevents transmission entirely. The PARTNER study followed gay couples where one partner was HIV-positive and on treatment, tracking condomless sex over thousands of couple-years. Among couples where the positive partner had a suppressed viral load, the HIV transmission rate was zero. This finding, summarized as U=U (Undetectable = Untransmittable), means that a person on successful treatment cannot pass the virus to a sexual partner.
Research Toward a Scalable Cure
Scientists are pursuing several strategies to replicate what stem cell transplants accomplish, but without the transplant itself. The most discussed approach is called “shock and kill.” The idea is to use drugs that force the hidden virus out of its dormant state in immune cells (the “shock”), then let the immune system or other therapies destroy those newly exposed cells (the “kill”). Dozens of compounds that can wake up dormant HIV in the lab have been identified, including drugs that modify how DNA is packaged inside cells and drugs that activate specific immune signaling pathways. So far, none have reliably cleared the reservoir in humans.
Gene editing is another active area. The goal is to mimic the CCR5-delta 32 mutation by editing a patient’s own cells to remove the receptor HIV uses to enter them. If successful, this would create the same protection the transplant donors naturally carry, without requiring a transplant at all. Early-phase trials are underway, though no results have demonstrated a cure yet.
An HIV vaccine has been a goal since the 1980s, but the virus mutates so rapidly that it has defeated every major candidate. The most recent large-scale trials, testing a combination vaccine regimen, failed to offer protection from infection. Vaccine research continues, but a preventive or therapeutic vaccine is not on the immediate horizon.
Where Things Stand
Seven people have been cured of HIV through a procedure too dangerous and rare to use broadly. For everyone else, daily or monthly treatment suppresses the virus to the point where it causes no illness and poses no transmission risk. That is a remarkable medical achievement, but it is not a cure. The virus persists in hidden reservoirs, and stopping medication almost always leads to the virus rebounding within weeks. Researchers are working on gene therapies, reservoir-clearing drugs, and other strategies to close that final gap, but none has yet succeeded in clinical trials. The honest answer is that HIV has been cured in a handful of extraordinary cases, but not in a way that can help most people living with it today.