FACT FIRST · ANALOGY SECOND
HBsAg
Factual definition
Hepatitis B surface antigen. A positive result can indicate current hepatitis B virus infection and needs interpretation with other tests and clinical context.
SATIRICAL ANALOGY — NOT A DEFINITION
Three letters that deserve a clinician’s explanation more than a late-night search spiral.
Related entries in the source book
These are reading links, not claims that the guide entry defines this term.