1 Viral Immunobiology, Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland.
2 Institute of Medical Virology, University of Zürich, Zürich, Switzerland.
3 Research Unit Gene Vectors, Helmholtz Zentrum München, German Research Center for Environmental Health and German Centre for Infection Research (DZIF), Partner Site Munich, Munich, Germany.
4 Viral Immunobiology, Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland chijioke@immunology.uzh.ch christian.muenz@uzh.ch.
5 Institute of Pathology and Medical Genetics, University Hospital Basel, Basel, Switzerland.