You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Christmas disease is treated by and explain in detail?
Fresh frozen contains all the coagulation factors except platelets. Also erythrocytes and leukocytes are absent in it. The specific treatment is with factor9 concentrate. The new extended half life recombinant factor 9 products made by Fc fusion, albumin fusion and pegylation offer the possibility of prophylaxis on a once-weekly or even two-weekly schedule. Reference : Davidson, 23rd Edition, page no : 974.