This means you can say: "I am deferring my choice until the end of the phase3 trials pending the outcome and results I will opt-in or opt-out of the therapy".
“oh but its safe" i hear you scream... millions of people have had it... Do you even know what safety in medicine means? Its not the immediate volume of datapoints that scientists study my dear... its those data points "over time". a histogram of patient outcomes across those data points.