With the Infection Zone Travel Ban event, is it the die that would cause an outbreak that goes back to the bag, or the first die that only fills a region?

Question

Accepted Answer

Only the die that would cause the outbreak goes back to the bag. The Travel Ban ignores outbreaks rather than infections, so the first die is placed normally to fill the region.

Pandemic: The Cure

With the Infection Zone Travel Ban event, is it the die that would cause an outbreak that goes back to the bag, or the first die that only fills a region?