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The variance of a set of data can never be negative.
Cervicitis
The swelling (inflammation) of the cervix, usually the result of an infection.
Cervical Edema
Swelling or excess fluid accumulation in the cervix, which can be a symptom of various medical conditions.
Pelvic Inflammatory Disease
An infection of the female reproductive organs, often caused by sexually transmitted bacteria.
Cystitis
Inflammation of the bladder, often caused by a urinary tract infection.
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