Is the nucleic acid test positive or negative?

It must be negative to be healthy, just like the current COVID-19 epidemic. Under such severe circumstances, if you have an accounting test report, you can know whether your body is healthy or not. Well, if it's negative, that means, alas, if it's someone who is not infected with COVID-19 virus, that means there is the induction of this starlight virus. I just want to identify it, but one of it is valid within seven days.