[null and void]

She’s had blood tests already that show her free of the virus.

You do know that in the early stages of the disease false negatives on the blood test are common, don't you?

It takes time for the virus to build up to levels the test can reliably detect.

[Conscience of a Conservative]

You do know that in the early stages of the disease false negatives on the blood test are common, don't you?

It takes time for the virus to build up to levels the test can reliably detect.

By the same logic, you do know that it takes time for the virus to build up to levels at which the virus can be transmitted to another person, don't you?