<p>A study involving UCL researchers found that a single gene therapy injection can dramatically reduce the bleeding risk faced by people with haemophilia B.</p>.<p>For the paper, published in the New England Journal of Medicine, experts from UCL, Royal Free Hospital and biotechnology company Freeline Therapeutics trialled and continue to evaluate a new type of adeno-associated virus (AAV) gene therapy candidate, called FLT180a, to treat severe and moderately severe cases of the condition.</p>