harder still not hard enough for these very coronaviruses and i think it is a prudent thing for work darragh to start making a vaccine which we might need in the future whether here or other parts of the world it could be given for example as a booster dose that would prevent these south african variant if you are rich. with the standards actually so all of these things are things that need to be monitored carefully and are you sure you the harder we look for variants. the more will find i'm afraid i'm sure as you said they haven't been reported yet but many are skeptical and saying it is already in here and even even on on tuesday the president lincoln variant which is something is more lethal more contagious actually is it showed up in the united states in minnesota but i want to talk about several years from now dr offit if the u.s. and the global population if they actually return immunity from these mass inoculations is it possible will continue interation of the crown of our summer and around the world will versions of the virus in the pandemic just be with us forever and that's someth