vaccination schedules that your kids and my kids have received over the years, often it's this model of the prime and then the boost. even for adults, you know, hepatitis, for example. prime and a boost if you've gotten that shot as an adult. so i think that that's where we're headed. it's sort of probably makes the most sense in terms of how these vaccines work. but we also have to see at the time that this may be available what is happening with covid in the country and in the world at that point. if the numbers are really low, that may dictate the thinking on whether those boosters will be recommended or not as well. >> dr. sanjay gupta, good to see you. happy new year. thanks for joining us. the sky is anything but friendly as mother nature and covid collide creating the perfect storm. how long will this last? plus, paging the trump siblings. why the new york attorney general wants ivanka and don junior to testify. that's ahead. now i'm ready for someone to call me mom. at northwestern mutual, our version of financial planning helps you live your dreams today.