That brings the total number of deaths in the u. S. To more than 14,000. Ktvus jenna cassie, joins us now with more on the Antibody Test that can determine if youve been exposed to the virus and may have immunity. Reporter the Old Testament doing nasal swab to see if there was a live virus. This is a blood test looks at whether you have antibodies that have been developed as a result of a previous infection. That could shed light on whether the survivors was circulating before covid19 tests were available. Stanford researchers launched new fda approved Antibody Testing this week. The goal is to protect Healthcare Workers in the general population and identify how many have covid19 antibodies and possible immunities. Whether or not those antibodies protect you from getting reinfected, whether they protect you from getting sick, maybe you could get reinfected and not get sick and then if thats the case, can you then infect other people . Reporter doctor bonnie maldonado, a stanford profe