Could a blood test for coronavirus antibodies get California back to normal? Lots of questions remain

“We don’t know what the correlation is between the antibody levels that we measure and the protection that’s conferred by that antibody,” said Philip Felgner, director of the vaccine research and development center at the UC Irvine School of Medicine. “That’s the link that we don’t have yet.” … Still, those answers are coming. Felgner’s team is planning to survey healthcare workers over time for a constellation of antibodies.