The Contact Tracers do not have medical degrees.
Thus, they are engaging in medical malpractice.
Contact Tracers will only be hired after they pass rigorous physical test and display a willingness to obey orders without question. No need for fancy degrees, just brawn and blind obedience.
They will have nice uniforms with armbands for easy identification, but likely they will be wearing L4 hazmat suits so it will be hard to tell. They will also have unmarked, windowless, soundproofed vans that can only be opened with a special key. Testees who fail or are dragged out of their homes will ride in the back and be delivered to nondescript buildings with doors that only open from the outside.
Just like in Wuhan, China in January.
President Xi will be beaming with pride.