The article said the patient showed signs of recovery and then later on started showing signs of the virus again. I don't know if that means they conducted an e

The article said the patient showed signs of recovery and then later on started showing signs of the virus again. I don't know if that means they conducted an exit test to confirm that she was negative for coronavirus after her first bout with it. Maybe it died down in her system, but wasn't completely gone when she was deemed healthy again and later on it flared up again for some reason.