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Why Can You Not Catch the Same Cold Twice, but a New

question 48

Essay

Why can you not catch the same cold twice, but a new cold will make you sick for a week or two?


Definitions:

Pineal Gland

A small endocrine gland in the brain that produces the hormone melatonin, which regulates sleep patterns.

Prolactin

A hormone produced by the anterior pituitary gland that stimulates milk production in mammals.

Pituitary Gland

A small, pea-sized gland located at the base of the brain, critical in controlling growth, metabolism, and reproductive functions.

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