Can she still spread it though?
From
@Dan 's description of the test, it sounds like they are testing respiratory secretions for the virus itself. If it is there (positive), it can be expelled as respiratory droplets (contagious). I would imagine that smaller quantities of the virus (recuperated/recuperating) would make it harder for the virus to find a new home. I am not a medical doctor, but this is my understanding.
Heard the same person was tested positive after 3 weeks of no symptoms.
Now we really need to understand how long can someone actually stay contagious.
Look up Typhoid Mary... She continued to shed Typhoid for the rest of her life and caused a couple outbreaks. Definitely not the norm.