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The one thing you can't truncate or coalesce or overlap is the Phase 3 trial, the proof is in the pudding. The Phase 3 trial's the pudding and now you're going to test hopefully 10, 15, 20,000 people that will get this vaccine, 15,000 people that will get placebo and you'll see to what extent this is really safe and you'll see to what extent it's effective.