ELI5: Explain Like I'm 5

Tertian

Tertian means that something happens every third day. Kind of like when you go to nursery school on Monday, then rest on Tuesday, then go again on Wednesday, and so on. So, if someone says they have a tertian fever, it means they have a fever that comes and goes every third day. It's like a pattern! This term is often used in medicine to describe how often a person experiences symptoms like fever, chills, or headache.
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