Why AstraZeneca-Oxford's Covid-19 Vaccine Is Different

P.M. Edition for Nov. 23. AstraZeneca and the University of Oxford say their two-dose Covid-19 vaccine has proven to be up to 90% effective. But its efficacy varied widely depending on the dosage. Reporter Joe Walker discusses how this third Western-developed Covid-19 vaccine is different from others and could be more widely used globally. Plus, President-elect Joe Biden plans to tap former Federal Reserve Chair Janet Yellen as the next Treasury Secretary. Annmarie Fertoli hosts. Learn more about your ad choices. Visit megaphone.fm/adchoices