TECHNICAL FIELD The present invention relates to a blue-green algae extract, particularly a blue-green algae, for use in regulating the immune response of a human or animal, in particular for activating an immune response to an infection. The present invention also relates to the non-therapeutic use of Aosa green algae extract to modulate the immune response. [Selection figure] None本発明は、人又は動物の免疫応答の調節に、特に、感染症への免疫応答を賦活化に用いるための、アオサ目藻類抽出物、特に、アオサ型緑藻に関する。また、本発明は、免疫応答を調節するためのアオサ型緑藻抽出物の非治療的使用に関する。【選択図】なし