It depends on how you measure the impact of the delay. It isn't like the population just magically catches up after 3 months... the whole uptake is delayed.
Let's assume the first 3 months causes a 1,000,000 to be delayed 3 months... then the next three months there's a 100,000 catchup, so that after 10 quarters we get back to where we would have gotten anyhow (same covered after 10 quarters regardless of approval date).
That creates a triangle of delays that adds to 5.5 million delayed 3 months. That would result in ~367 x 5.5 = ~2,000 deaths.