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 tracingsurveillanceVaccinevideoVITAMINvlogYouTubeRelated Posts Did Your Allergies Get Worse After COVID? Watch This February 26, 2026 There may be a universal vaccine in the future. #science #vaccine #doctor February 21, 2026 The Immune Shift No One Explains After COVID February 19, 2026 Doctor Reacts: Covid masks in 2026?! February 19, 2026 ‘Particularly capricious’: Doctor weighs in on undermining of mRNA technology February 15, 2026 COVID’s Hidden Impact: Immune System Triggers Explained #shorts January 30, 2026