It's not just tests. All symptoms disappear - we had health workers coming back to hospital and days later symptoms reappeared
EDIT: to clarify: in my hospital there were colleagues who tested positive, isolated, had no symptoms, went back to work, still no symptoms. After a few days symptoms are back and they tested positive again
EDIT: to clarify: in my hospital there were colleagues who tested positive, isolated, had no symptoms, went back to work, still no symptoms. After a few days symptoms are back and they tested positive again