The world knows him as the “London Patient,” the second known person in the world to have been “cured” of HIV. A year after we first heard of him, the “London Patient” had chosen to reveal his identity because he wants “to be an ambassador of hope” to those “who have HIV or cancer as well as those people who have gone through a transplant.” He said to New York Times, “This is a unique position to be in, a unique and very humbling position.”

Coming out and telling his story was not an easy decision for him to make and it took him several months to prepare himself physically and mentally  but he did it because, “I don’t want people to think, ‘Oh, you’ve been chosen,'” he told New York Times. “No, it just happened. I was in the right place, probably at the right time, when it happened.” He added that it’s thanks to the support of friends and family that, “we’re here today — you never, never know.”

“He” is Adam Castillejo, 40 years old. He is of mixed Spanish-Dutch heritage who hails from Venezuela but had been living in London for 20 years now and here is his story.

Mr. Castillejo was 23 when he was diagnosed with HIV in 2003—a time when an HIV diagnosis was still seen as a death sentence. He described it as a “very terrifying and traumatic experience to go through” but thanks to the antiretroviral drugs, his HIV was suppressed to undetectable levels. Fast forward to 2012 and he was diagnosed with Stage 4 lymphoma, a blood cancer. 

In 2016, Mr. Castillejo’s cancer battle had taken a turn for the worse and his doctors performed a bone marrow transplant to “replace his immune system and clear the cancer.” His donor (not related to Mr. Castillejo), is a carrier of ‘CCR5 delta 32,’ a genetic mutation resistant to HIV that prevents the entry of HIV into cells, thereby clearing Mr. Castillejo of the virus as well. 

Mr. Castillejo continued to take his antiretroviral drugs for 17 months after the transplant up until October 2017. After which, his doctors had waited another 17 months to announce to the world in March 2019 that he had been cured of HIV. According to the researchers, Mr. Castillejo “has been in remission for 30 months ‘with no viable virus in bloods, brain fluid, intestinal or lymph tissue.'”

Professor and HIV biologist Ravindra Gupta of the University of Cambridge and Mr. Castillejo’s virologist,  said last year that the treatment was Mr. Castillejo’s last chance to survive. Today, Dr. Gupta—who had been cautious of calling it a cure last year and opted for the word “remission” instead—had said, “We think this is a cure now, because it’s been another year and we’ve done a few more tests.”

While the treatment had proven to be successful as both Mr. Castillejo’s cancer and HIV had gone into remission, the procedure however, is considered a risky one and is performed only as a “last resort” even in patients who have both HIV and cancer. Still, Anton Pozniak, president of the International AIDS Society, said that, “Although it is not a viable large-scale strategy for a cure… these new findings reaffirm our belief that there exists a proof of concept that HIV is curable.” He added, “The hope is that this will eventually lead to a safe, cost-effective and easy strategy to achieve these results using gene technology or antibody techniques.”

The first patient to be cleared of HIV was an American man named Timothy Brown who lived and underwent similar treatment in Berlin. His cure was first announced at the 2008 Conference on Retroviruses and Opportunistic Infections where Mr. Brown was called “The Berlin Patient.”

Read more about Mr. Castillejo’s story here and here.