What do you mean by negative?

In physical examination, generally speaking, negative means normal, positive means sick or virus.

"Negative" and "positive" are widely used in medicine, and have become a term to indicate the presence or absence, or to indicate the results of an examination.

"Negative" in mental illness: To be exact, "negative symptoms" refers to a group of symptoms, including: lack of thinking, apathy or dullness, lack of will and social withdrawal, which is the decline or absence of normal mental activities. Also known as "mental decline". At present, there is no way to change this defect state in the medical field.