updupdate ed vaccccine that targets the delta variant? >> the answer is yes. we have been doing that. we've been following some of those trials. pfizer is working on a delta specific variant booster now. moderna tried this with one of the previous variants and this is a question that's not answered. is it just fine to give another shot of the existing vaccine because we've seen how much they can boost antibody levels. that may be the right answer. it's just the same vaccine at some point in the future for a booster. they are working on variant specific vaccines. >> there's a fewer question who asks i want to know how it's affecting our children especially those under 12 that can't be vaccinated. are they getting delta at a higher rate than previous covid?