Are these antibody or antigen tests? I am extremely suspect that the antibody tests being used are not delivering false positives. There was a study that show

Are these antibody or antigen tests? I am extremely suspect that the antibody tests being used are not delivering false positives. There was a study that showed 800,000 people in Los Angeles likely have antibodies. This does not make sense given that the ICU admissions did not even remotely track that of Northern Italy, which shared a similar population size. I suspect that these antibody tests are picking up a positive on another another Coronavirus.