but even after the fall and winter. after all a lot of people have been vaccinated over the summer or recently vaccinated and so it will be fresh and carry them through certainly the delta surge. >> but if vaccine efficacy drops over time, do these mandates, will they have dates on when you need to be vaccinated by? >> it is a good question. again, i don't think that they are going to tie these mandates, these requirements, to a third booster. businesses are asking to be vaccinated by a certain date in order to return to work. people getting vaccinated right now will be in a good position because they will have a vaccine that is fresh providing them good immunity through the delta wave of infection. and one of the reasons why we might be seeing declining efficacy of the original primary series is that the doses were spaced close together. one conversation people could