lol... you don't even understand basic biology.
If you have covid antibodies you are immune. No one is a threat to you.
PCR doesn't test for covid antibodies though, it tests for 'viral debris'. That is when your body destroys the virus shell, its DNA/RNA is broken up and floats through your blood stream. The PCR amplifies these parts until there are enough of them to do DNA tests to verify if you have it or not.
The only way a PCR shows positive is if your body has already broken down the viruses. Its simple science.
As to racism. We are all one race with different attributes. I care more about the content of someone's character than I do about their skin tone. People like you assume anyone that disagrees with you is automatically racist, but by calling half the country racist, you make that word meaningless.