showing us what we have not learned. this study concluding essentially that the entire world sun prepared for the next pandemic. not a single country scored well on the global health security index. the average score for preparedness was about 38.9, and that is really unchanged since 2019. just think about that. the u.s., if you're wondering, scored just under 76. >> maybe we're just so overwhelmed with this one, it's hard to think about the next one. >> alexandria field, thank you. joining us now, dr. zeke emanuel. he was white house health policy adviser and one of the architects of obamacare. he's the author of which country has the world's best health care. and he's currently vice provost of global initiatives at the university of pennsylvania. dr. emanuel, good to have you. let's start here with how many doses should make up or define fully vaccinated? we've heard there from pfizer that the protection against omicron from three doses equals