That looks to me like an antigen test, not a PCR test. And they are done with blood samples. [edit] Never mind, the blood tests are for the covid antibodies. I've done a few of which, forgot which was which. But still, the same points apply. They are meant to be used with mucus, not with other things.

That looks to me like an antigen test, not a PCR test. And they are done with blood samples.