Definition: The word "antipathies" originally referred to diseases where an immune system responded mistakenly to its own body parts, usually in a way that made one person sick, causing symptoms like fever or vomiting. Antipathies are similar but more severe cases, with both the immune response and symptoms resembling those of a disease caused by a virus or bacteria. They are not typically recognized as diseases in their native languages, although they often have antiviral medications that treat them.