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A woman’s social media campaign to save her husband’s life has come to a very happy end.

Kate Brandon and her husband Mike of the U.K. are celebrating after an experimental treatment they took a chance resulted in success. Doctors say there is no longer any sign of leukemia in Mike’s body.

According to Kate’s GoFundMe page, Mike was diagnosed with leukemia in January 2014, just one month after Mike proposed to Kate.

“When my [leukemia] relapsed in March, we were told that it was time to plan our last days together, but Kate point blank refused,” Mike Brandon wrote on the couple’s GoFundMe page, according to ABC News. “We would fight on, and we have.”

Mike was lucky the first time, his wife says. They were able to find a bone marrow donor. He received the life-saving transplant on his 30th birthday, June 26, 2014.

The two were married one year later.

Then, less than a year into married life, doctors told Mike his leukemia had returned, this time at an aggressive rate. The couple had exhausted their treatment options in the U.K.

Doctors told them there was one last option – a revolutionary experimental treatment at the University of Pennsylvania’s Abramson Cancer Center.

Determined to save her husband’s life, Kate launched a social media campaign to raise $600,000 for the treatment. They were able to raise the money and Mike and Kate headed to the U.S., hoping for the best.

The treatment caused Mike to become very sick, but doctors assured the couple that it was a sign that the treatment would work.

Finally, in an update posted online this week, Kate shared some very positive news.

“After what can only be described as a completely agonizing 3 months we wanted to share with you some wonderful news: Mike’s initial bone marrow biopsy test has come back clear!” wrote Kate.

The couple thanked their supporters in the post.

“We thank each and every one of you for getting us here. We simply couldn’t have done this without you all,” wrote Kate.