Contact tracing, no doubt. But contract tracing does not proof anything, as it is circumstantial.

What would be required first is to isolate "the virus" and show that it causes a certain set of pathologies in accordance with the Koch Postulates.

However, the Koch procedure does not proof transmission pathways. only that an isolate can act as a pathogen.

What would be required then is to show HOW transmission works from one to the next person.

And as is held by Dr. Kaufman and others, you only can get sick by transfection (= injection!)