You do a pristine type of a trial, but if you would them employ the people who are needing the vaccine as part of the Clinical Trial where you compare one vaccine against another or one dose against another so you accomplish two things. You try and determine if its safe and effective, even though it isnt as definitive as the pristine trial, but getting people in these trials, you make it available. So where we know what the dose is to have an expanded trial. Within the context of that trial,