a medical condition that develops slowly and persists for a long period of time, often being difficult to cure

a disease that comes on suddenly and progresses rapidly with severe symptoms

An extremely small microorganism consisting of protein and nucleic acids that can pass through the smallest filters and must be viewed with an electron microscope; often abbreviated to [[病毒|病毒|bing4 du2]].

Diseases specific to men, including male infertility, erectile dysfunction, or prostate issues

an allergic disease or condition, such as hypersensitivity or anaphylaxis