 Each participant will have 3 injections of the same treatment, these are given 4 weeks apart. During the treatment, participants will undergo various monitoring including blood urine tests, mixed meal tolerance tests, lymph node biopsies. A follow up appointment will take place 6 weeks after the last injection. Possible side effects include bruising and discomfort at the site of the blood test and lymph node tests, local redness and swelling reactions at the site of the injections, severe allergic reaction to the injection requiring treatment, such as steroids, adrenaline or fluids. 