Question

why the doctor have + sign​

Answer 1

Answer:

Explanation:

A plus sign (+) is used in medical jargon as a way to let ones know that information is positive, such as in the situation of a blood test for HIV. If the results are positive, the results can be written as HIV+ or if negative they will be written HIV-.

The negative sign is not seen as often as a (+) as the information is not conveyed as often. The results are not given when data is not positive, such as in a medical history. Only positive results are given.

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Answer 2

first of all , I will make clear that red plus symbol is not for doctors. Actually this is for Red Cross Society. Every country has it's own symbol..

Symbol of doctors is in my attachment