Johns Hopkins’ Jeffrey Kahn discusses some basic questions about COVID-19 immunity certificates, including ethical and legal issues and how effective immunity tests will be.For full transcript and audio from this talk, please go to: antibodiesantibody testberman center for bioethicscarnegie council for ethics in international affairsCertificatescontact tracingCoronaviruscovid 19 vaccineCOVID-19covid-19 antibodyCOVID-19 immune systemCOVID-19 immunityFundamentalsimmune systemIMMUNITYimmunity certificatesjeff kahnjeffreyjeffrey kahnJohns HopkinsKahnpandemicPrivacyproximity tracingsurveillanceVaccinevideoVITAMINvlogYouTube