There are a lot more Covid testing options available than there used to be—here’s how to find the right one for your situation

The antigen tests can be more variable in terms of accuracy, says Dr. Philip Felgner, PhD, director of the UCI Vaccine Research and Development Center [and professor of physiology and biophysics] at the University of California, Irvine. “So, it’s hard to make a blanket statement that antigen tests are better or worse than the PCR tests, because it depends on which antigen test you are using,” he says. … “Antibody tests measure whether you were previously exposed to the virus, or whether you were vaccinated and still have the antibody response to what is presented in the vaccine,” explains Dr. Felgner.