she is a member of the pediatric advisory panel for the cdc and someone who led the pfizer trial for six month olds to 11-year-olds. thank you for joining us today. i know today was pretty exciting, not just because it was the first day that young kids could get the vaccine, but it was rewarding to you and the folks in your trial for another reason. >> absolutely. we just got notice from our families that -- we just let our families know in the trial that they were going to be unblinded. all of the families got to find out after all these months whether they got the vaccine or placebo. of course, for the kids who got placebo, they will be offered opportunities to get the vaccine. the kids who are vaccinated were also super happy. one of the moms said she was more excited now than when she found out she was pregnant. a lot of happy tears and excitement that other children will have this vaccine. kristen: is it your advice to all parents to get your kids the shock as soon as -- get their kids the shot as soon as possible? are there certain people who should wait? >> i really think, for