worth it because of the benefit that children will get from the vaccine at their particular age group. and that's going to be a regulatory decision. >> how long would that be? >> well, that could be a couple of extra months. we don't know if we'll get the regulatory decision by the late fall, early winter, or it my go into the following year. i hope it's in this calendar year. >> would they give an emergency use authorization on something like that to speed it up as opposed to waiting to give the full approval for little kids? >> good question, anderson. that is a possibility. the emergency use authorization will be predicated on their feeling is it an emergent situation in the children to get them the vaccine until we get further amount of data to give it the full approval. and that's going to be an fda