In Sickness and in Health

Last December, the Pfizer-BioNTech Covid-19 vaccine became the first covid-19 vaccine to be authorized for use in the world following large-scale clinical trials. Today, CNN’s Chief Medical Correspondent Dr. Sanjay Gupta sits down with Dr. Ugur Sahin and Dr. Ozlem Tureci, the husband-and-wife scientists who designed the vaccine.

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