TY - RPRT TI - Immunity against prions? AU - F L Heppner AU - I Arrighi AU - U Kalinke AU - A Aguzzi PY - 2001 DO - 10.1016/s1471-4914(01)02182-7 UR - https://pubmed.ncbi.nlm.nih.gov/11689311/ ID - 11689311 ER -