english: But this was in 1974, and as of that moment, this photograph was the photograph that was the most widely printed, because we printed two billion copies of this photograph, and we took them hand to hand, door to door, to show people and ask them if there was smallpox in their house, because that was our surveillance system.
non_english: Maar dit was in 1974, en toen was deze foto de meest afgedrukte foto omdat we twee miljard exemplaren van deze foto hebben gemaakt. We zijn er mee van deur tot deur gegaan om ze mensen te laten zien en hen te vragen of er in hun huis pokken waren. Dat was ons surveillantiesysteem.