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 COVID’s New Variant Is Spreading Faster Than Expected April 18, 2026 COVID’s New Variant Is Spreading Faster Than Expected April 16, 2026 These Aren’t Just Hormone Problems April 16, 2026 New COVID Variant ‘Cicada’ Spreading Across U.S. | Seniors at Highest Risk April 15, 2026 Persistent immune activation and MS explosion #diseaseprevention April 13, 2026 Cicada COVID Variant Spreading in U.S. | What Doctors Want You to Know Now April 12, 2026