Nasalflu is a novel influenza subunit vaccine, which is administered by the intranasal route using a spray device. Nasalflu is based on the virosomal concept which is registered in the EU as Epaxal Berna, a vaccine against Hepatitis A, and Inflexal Berna V, a subunit influenza vaccine. The virosome is a carrier system which delivers antigens to cells and is able to induce both B- and T-cell immunity. When virosomal vaccines are given parenterally, an immune response is elicited fast and sufficiently.
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Reinhard Glück (2002) studied this question.
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