Medical authoritarianism. Starts with forced testing, which then leads to "contact tracing", meaning more forced testing, which involves home invasion should there be resistance. Any forced medical procedure, done against the will of a person, is medical authoritarianism. It is 'The State' declaring control of your person. 'Have to do this because it's a deadly disease and we can't have people infecting others ...now can we'. So-called virus-testing, vaccination, and so-called 'antibody testing', are medical procedures. Done against the will, it is medical authoritarianism.
Now, also, considering the fact that a "vaccination" for a non-existent made-up 'virus' cannot of course be a real thing*, nor can there be any "antibodies" as the result of recovering from a fictional virus, the true motive for forcing such measures can only be medical authoritarianism.