kawsar: it is likely. we know the virus is changing all the time.here may eventually be a variant where a different vaccine may be better. all of these vaccines, the nature of their platforms make as it easy to adapt to new variants. that is the good news. hopefully, we will be able to stay ahead of the virus and keep it under control. alix: in order to do that, we need more people to be vaccinated for the first time. we are now getting companies mandating vaccines, threatening their workers, that they will be fired or laid off if they don't get the vaccine. what else can we do right now? kawsar: i think vaccine mandates work, but we need to first meet people where they are, understand why they are hesitant to get a vaccine, see if we can address some of their concerns. these vaccines are new, have been around for almost a year, but they have had an untroubled track record. 185 million people in the u.s. are vaccinated against covid. one billion people worldwide who are vaccinated. we know that these vaccines are safe, effective. i think it is reall