a lot of covid news tonight. as we touched on earlier, president biden announcing plans to purchase 500 million doses of the pfizer vaccine to give to people around the world. and late today, word of a dissenting voice on approving vaccines for use in children under 12. dr. meisner spoke out at a meeting of the fda s vaccines and related biological products advisory committee. and he joins us, now. doctor, thanks so much for being with us. so, why don t you think an emergency-use authorization can be justified for children under 12 years old, now? what are you most concerned about? well, first, thank you, john, for the invitation, tonight. i i appreciate the opportunity. i think, um, first of all, we have to remember that these vaccines are absolutely extraordinary. and these vaccines are leading us out of the pandemic.