observational gene therapy has in effect heal one man of Haemophilia B , a blood disorder in which stock clots can not work easily , British doctors report . The therapy , detailed in a paper in theNew England Journal of Medicine , repairs the mutated gene and allows the body to make a vital coagulation protein once more , with Elliott Mason , who has lived with the status since birth , stating he now lives a normal living .

hoi polloi with Haemophilia B have a deficiency in clabber broker IX due to inherit mutation in the gene that make the divisor , result in blood that can not clog . The disease can be highly dangerous if stirred people are n’t argus-eyed with any potential cut , and Mason told theBBCthat he was unable to play his favorite sport at school and said teachers “ wrapped me up in bubble wrapper . ”

Mason was enrolled in a 10 - affected role Phase 1–2 trial of an adenovirus - associated vector factor therapy led by Professor Pratima Chowdary of the Royal Free Hospital and University College London . Each person was give the therapy plus a course of immunosuppressants in an attempt to permit the virus to change the mutate factor in the desired way . The treatment consisted of an IV drip for just an 60 minutes .

After 26 weeks , each person was hollo for a follow - up to appraise their current agent IX level .

For Mason , the intervention felt like a miracle cure .

" I ’ve not had any treatment since I had my therapy , it ’s all a miracle really , well it ’s scientific discipline , but it feels quite miraculous to me , " says Elliott , in a affirmation to the BBC .

" My life is completely normal , there ’s nothing that I have to stop and think ' how might my haemophilia affect this ? ' . "

The therapy seems to be relatively safe , take over the dose is tightly verify , and effective in the long full term . The researchers think Haemophilia B will no longer be a trouble in the next few years . However , many question still remain , including whether the effect will scale with big sample distribution size , and the likely high cost of the gene therapy – these therapy are notoriously expensive , with some fetch as high as$2.5 million ( £ 2.1 million ) per dose .