a large percent of these people are getting the ma seeno. the vaccine is protecting them. we could see the first needles going into arms later this year. >> all right. in about six weeks, we hope. why can people begin getting the first vaccines? i'm not -- well, why doesn't make sense. it's who do we think will be in line first? >> what the early estimates and what makes the most sense are the people at the highest risk of contracting covid. the people who we need, so that's essential workers, people not only on the health care front line but those keeping our lives running. those are the ones. there are high risk individuals of vulnerable populations and the trickle down effect. we're not necessarily going to have a widespread protective vaccine available for everyone until possibly late summer or even after that. i think there's a special worry or note about children and when they'll be able to get the vaccine. >> i know. some people say children should get them earlier so they can go back to school. moderna disclosed today that it faces huge challenges for the roll out.