What do you mean by positive and negative? What do you mean by positive and negative?

1, negative and positive are a way to express the test results in clinic. Generally, affirmation means existence, and negation means non-existence. For example, in the clinical examination of Helicobacter pylori, the carbon 14 breath test is used, and the positive indicates the existence of Helicobacter pylori infection, and the negative indicates the absence of Helicobacter pylori infection.

2. Take blood to check whether you are pregnant. If the test results are positive, you are pregnant. If the test result is negative, you are not pregnant. Two and a half hepatitis B antibodies are positive, indicating that there is hepatitis B, and negative indicates that there is no hepatitis B, so it is necessary to judge the clinical significance of positive and negative test results in combination with the specific items of patients.