The investigators want to investigate whether specific immunotherapy can be delivered
directly into a lymph node. The investigators think that a direct introduction of allergen to
the antigen presenting cells in the lymph node a give a strong immune response and that this
can change the number of injections needed in allergen immunotherapy. The investigators do
measurements of clinical effect and a variety of paraclinical test to see if the
investigators can find af biomarker of successful specific immune therapy of grass allergy.