Eric Cartman got the AIDS (Acquired Immune Deficiency Syndrome) virus, HIV (Human Immunodeficiency Virus), from getting a blood tranfusion via bone marrow while getting his tonsils taken out at the hospital.
"Airport Hilton" is indeed a real hotel located at airports all around the world owned by the Hilton Hotels Corportation. More information is available by clicking on the following link,
"SNN" is indeed a fictional cable news station but is beleived to be a parody of the real cable news station "CNN" ("Cable News Network"). More information is available by clicking on the following link